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TOI-257b (HD 19916b): a warm sub-saturn orbiting an evolved F-type starAddison, Brett C.Wright, Duncan J.Nicholson, Belinda A.Cale, BrysonMocnik, TeoHuber, DanielPlavchan, PeterWittenmyer, Robert A.Vanderburg, AndrewChaplin, William J.Chontos, AshleyClark, Jake T.Eastman, Jason D.Ziegler, CarlBrahm, RafaelCarter, Bradley D.Clerte, MathieuEspinoza, NéstorHorner, JonathanBentley, JohnJordán, AndrésKane, Stephen R.Kielkopf, John F.Laychock, EmilieMengel, Matthew W.Okumura, JackStassun, Keivan G.Bedding, Timothy R.Bowler, Brendan P.Burnelis, AndriusBlanco-Cuaresma, SergiCollins, MichaelaCrossfield, IanDavis, Allen B.Evensberget, DagHeitzmann, AlexisHowell, Steve B.Law, NicholasMann, Andrew W.Marsden, Stephen C.Matson, Rachel A.O'Connor, James H.Shporer, AviStevens, CatherineTinney, C. G.Tylor, ChristopherWang, SonghuZhang, HuiHenning, ThomasKossakowski, DianaRicker, GeorgeSarkis, PaulaSchlecker, MartinTorres, PascalVanderspek, RolandLatham, David W.Seager, SaraWinn, Joshua N.Jenkins, Jon M.Mireles, IsmaelRowden, PamPepper, JoshuaDaylan, TansuSchlieder, Joshua E.Collins, Karen A.Collins, Kevin I.Tan, Thiam-GuanBall, Warrick H.Basu, SarbaniBuzasi, Derek L.Campante, Tiago L.Corsaro, EnricoGonzález-Cuesta, L.Davies, Guy R.de Almeida, LeandroDo Nascimento, Jose-Dias, Jr.García, Rafael A.Guo, ZhaoHandberg, RasmusHekker, SaskiaHey, Daniel R.Kallinger, ThomasKawaler, Steven D.Kayhan, CenkKuszlewicz, James S.Lund, Mikkel N.Lyttle, AlexanderMathur, SavitaMiglio, AndreaMosser, BenoitNielsen, Martin B.Serenelli, Aldo M.Aguirre, Victor SilvaThemeßl, NathalieDOI: info:10.1093/mnras/staa3960v. 5023704–3722
Addison, Brett C., Wright, Duncan J., Nicholson, Belinda A., Cale, Bryson, Mocnik, Teo, Huber, Daniel, Plavchan, Peter, Wittenmyer, Robert A., Vanderburg, Andrew, Chaplin, William J., Chontos, Ashley, Clark, Jake T., Eastman, Jason D., Ziegler, Carl, Brahm, Rafael, Carter, Bradley D., Clerte, Mathieu, Espinoza, Néstor, Horner, Jonathan, Bentley, John, Jordán, Andrés, Kane, Stephen R., Kielkopf, John F., Laychock, Emilie, Mengel, Matthew W. et al. 2021. "TOI-257b (HD 19916b): a warm sub-saturn orbiting an evolved F-type star." Monthly Notices of the Royal Astronomical Society 502:3704– 3722. https://doi.org/10.1093/mnras/staa3960
ID: 159268
Type: article
Authors: Addison, Brett C.; Wright, Duncan J.; Nicholson, Belinda A.; Cale, Bryson; Mocnik, Teo; Huber, Daniel; Plavchan, Peter; Wittenmyer, Robert A.; Vanderburg, Andrew; Chaplin, William J.; Chontos, Ashley; Clark, Jake T.; Eastman, Jason D.; Ziegler, Carl; Brahm, Rafael; Carter, Bradley D.; Clerte, Mathieu; Espinoza, Néstor; Horner, Jonathan; Bentley, John; Jordán, Andrés; Kane, Stephen R.; Kielkopf, John F.; Laychock, Emilie; Mengel, Matthew W.; Okumura, Jack; Stassun, Keivan G.; Bedding, Timothy R.; Bowler, Brendan P.; Burnelis, Andrius; Blanco-Cuaresma, Sergi; Collins, Michaela; Crossfield, Ian; Davis, Allen B.; Evensberget, Dag; Heitzmann, Alexis; Howell, Steve B.; Law, Nicholas; Mann, Andrew W.; Marsden, Stephen C.; Matson, Rachel A.; O'Connor, James H.; Shporer, Avi; Stevens, Catherine; Tinney, C. G.; Tylor, Christopher; Wang, Songhu; Zhang, Hui; Henning, Thomas; Kossakowski, Diana; Ricker, George; Sarkis, Paula; Schlecker, Martin; Torres, Pascal; Vanderspek, Roland; Latham, David W.; Seager, Sara; Winn, Joshua N.; Jenkins, Jon M.; Mireles, Ismael; Rowden, Pam; Pepper, Joshua; Daylan, Tansu; Schlieder, Joshua E.; Collins, Karen A.; Collins, Kevin I.; Tan, Thiam-Guan; Ball, Warrick H.; Basu, Sarbani; Buzasi, Derek L.; Campante, Tiago L.; Corsaro, Enrico; González-Cuesta, L.; Davies, Guy R.; de Almeida, Leandro; Do Nascimento, Jose-Dias, Jr.; García, Rafael A.; Guo, Zhao; Handberg, Rasmus; Hekker, Saskia; Hey, Daniel R.; Kallinger, Thomas; Kawaler, Steven D.; Kayhan, Cenk; Kuszlewicz, James S.; Lund, Mikkel N.; Lyttle, Alexander; Mathur, Savita; Miglio, Andrea; Mosser, Benoit; Nielsen, Martin B.; Serenelli, Aldo M.; Aguirre, Victor Silva; Themeßl, Nathalie
Abstract: We report the discovery of a warm sub-Saturn, TOI-257b (HD 19916b), based on data from NASA's Transiting Exoplanet Survey Satellite (TESS). The transit signal was detected by TESS and confirmed to be of planetary origin based on radial velocity observations. An analysis of the TESS photometry, the MINERVA-Australis, FEROS, and HARPS radial velocities, and the asteroseismic data of the stellar oscillations reveals that TOI-257b has a mass of MP = 0.138 ± 0.023 $\rm {M_J}$ (43.9 ± 7.3 $\, M_{\rm \oplus}$ ), a radius of RP = 0.639 ± 0.013 $\rm {R_J}$ (7.16 ± 0.15 $\, \mathrm{ R}_{\rm \oplus}$ ), bulk density of $0.65^{+0.12}_{-0.11}$ (cgs), and period $18.38818^{+0.00085}_{-0.00084}$ $\rm {days}$ . TOI-257b orbits a bright (V = 7.612 mag) somewhat evolved late F-type star with M* = 1.390 ± 0.046 $\rm {M_{sun}}$ , R* = 1.888 ± 0.033 $\rm {R_{sun}}$ , Teff = 6075 ± 90 $\rm {K}$ , and vsin i = 11.3 ± 0.5 km s-1. Additionally, we find hints for a second non-transiting sub-Saturn mass planet on a ∼71 day orbit using the radial velocity data. This system joins the ranks of a small number of exoplanet host stars (∼100) that have been characterized with asteroseismology. Warm sub-Saturns are rare in the known sample of exoplanets, and thus the discovery of TOI-257b is important in the context of future work studying the formation and migration history of similar planetary systems.
TOI-811b and TOI-852b: New Transiting Brown Dwarfs with Similar Masses and Very Different Radii and Ages from the TESS MissionCarmichael, Theron W.Quinn, Samuel N.Zhou, GeorgeGrieves, NolanIrwin, Jonathan M.Stassun, Keivan G.Vanderburg, Andrew M.Winn, Joshua N.Bouchy, FrancoisBrasseur, Clara E.Briceño, CésarCaldwell, Douglas A.Charbonneau, DavidCollins, Karen A.Colon, Knicole D.Eastman, Jason D.Fausnaugh, MichaelFong, WilliamFűrész, GáborHuang, ChelseaJenkins, Jon M.Kielkopf, John F.Latham, David W.Law, NicholasLund, Michael B.Mann, Andrew W.Ricker, George R.Rodriguez, Joseph E.Schwarz, Richard P.Shporer, AviTenenbaum, PeterWood, Mackenna L.Ziegler, CarlDOI: info:10.3847/1538-3881/abd4e1v. 16197
Carmichael, Theron W., Quinn, Samuel N., Zhou, George, Grieves, Nolan, Irwin, Jonathan M., Stassun, Keivan G., Vanderburg, Andrew M., Winn, Joshua N., Bouchy, Francois, Brasseur, Clara E., Briceño, César, Caldwell, Douglas A., Charbonneau, David, Collins, Karen A., Colon, Knicole D., Eastman, Jason D., Fausnaugh, Michael, Fong, William, Fűrész, Gábor, Huang, Chelsea, Jenkins, Jon M., Kielkopf, John F., Latham, David W., Law, Nicholas, Lund, Michael B. et al. 2021. "TOI-811b and TOI-852b: New Transiting Brown Dwarfs with Similar Masses and Very Different Radii and Ages from the TESS Mission." The Astronomical Journal 161:97. https://doi.org/10.3847/1538-3881/abd4e1
ID: 159333
Type: article
Authors: Carmichael, Theron W.; Quinn, Samuel N.; Zhou, George; Grieves, Nolan; Irwin, Jonathan M.; Stassun, Keivan G.; Vanderburg, Andrew M.; Winn, Joshua N.; Bouchy, Francois; Brasseur, Clara E.; Briceño, César; Caldwell, Douglas A.; Charbonneau, David; Collins, Karen A.; Colon, Knicole D.; Eastman, Jason D.; Fausnaugh, Michael; Fong, William; Fűrész, Gábor; Huang, Chelsea; Jenkins, Jon M.; Kielkopf, John F.; Latham, David W.; Law, Nicholas; Lund, Michael B.; Mann, Andrew W.; Ricker, George R.; Rodriguez, Joseph E.; Schwarz, Richard P.; Shporer, Avi; Tenenbaum, Peter; Wood, Mackenna L.; Ziegler, Carl
Abstract: We report the discovery of two transiting brown dwarfs (BDs), TOI-811b and TOI-852b, from NASA's Transiting Exoplanet Survey Satellite mission. These two transiting BDs have similar masses but very different radii and ages. Their host stars have similar masses, effective temperatures, and metallicities. The younger and larger transiting BD is TOI-811b at a mass of Mb = 59.9 ± 13.0MJ and radius of Rb = 1.26 ± 0.06RJ, and it orbits its host star in a period of P = 25.16551 ± 0.00004 days. We derive the host star's age of ${93}_{-29}^{+61}$ Myr from an application of gyrochronology. The youth of this system, rather than external heating from its host star, is why this BD's radius is relatively large. This constraint on the youth of TOI-811b allows us to test substellar mass-radius evolutionary models at young ages where the radius of BDs changes rapidly. TOI-852b has a similar mass at Mb = 53.7 ± 1.4MJ but is much older (4 or 8 Gyr, based on bimodal isochrone results of the host star) and is also smaller with a radius of Rb = 0.83 ± 0.04RJ. TOI-852b's orbital period is P = 4.94561 ± 0.00008 days. TOI-852b joins the likes of other old transiting BDs that trace out the oldest substellar mass-radius evolutionary models where contraction of the BD's radius slows and approaches a constant value. Both host stars have a mass of M = 1.32M ± 0.05 and differ in their radii, Teff, and [Fe/H], with TOI-811 having R = 1.27 ± 0.09R, Teff = 6107 ± 77 K, and [Fe/H] = + 0.40 ± 0.09 and TOI-852 having R = 1.71 ± 0.04R, Teff = 5768 ± 84 K, and [Fe/H] = + 0.33 ± 0.09. We take this opportunity to examine how TOI-811b and TOI-852b serve as test points for young and old substellar isochrones, respectively.
Giant Outer Transiting Exoplanet Mass (GOT 'EM) Survey. I. Confirmation of an Eccentric, Cool Jupiter with an Interior Earth-sized Planet Orbiting Kepler-1514Dalba, Paul A.Kane, Stephen R.Isaacson, HowardGiacalone, StevenHoward, Andrew W.Rodriguez, Joseph E.Vanderburg, AndrewEastman, Jason D.Kraus, Adam L.Dupuy, Trent J.Weiss, Lauren M.Schwieterman, Edward W.DOI: info:10.3847/1538-3881/abd408v. 161103
Dalba, Paul A., Kane, Stephen R., Isaacson, Howard, Giacalone, Steven, Howard, Andrew W., Rodriguez, Joseph E., Vanderburg, Andrew, Eastman, Jason D., Kraus, Adam L., Dupuy, Trent J., Weiss, Lauren M., and Schwieterman, Edward W. 2021. "Giant Outer Transiting Exoplanet Mass (GOT 'EM) Survey. I. Confirmation of an Eccentric, Cool Jupiter with an Interior Earth-sized Planet Orbiting Kepler-1514." The Astronomical Journal 161:103. https://doi.org/10.3847/1538-3881/abd408
ID: 159325
Type: article
Authors: Dalba, Paul A.; Kane, Stephen R.; Isaacson, Howard; Giacalone, Steven; Howard, Andrew W.; Rodriguez, Joseph E.; Vanderburg, Andrew; Eastman, Jason D.; Kraus, Adam L.; Dupuy, Trent J.; Weiss, Lauren M.; Schwieterman, Edward W.
Abstract: Despite the severe bias of the transit method of exoplanet discovery toward short orbital periods, a modest sample of transiting exoplanets with orbital periods greater than 100 days is known. Long-term radial velocity (RV) surveys are pivotal to confirming these signals and generating a set of planetary masses and densities for planets receiving moderate to low irradiation from their host stars. Here we conduct RV observations of Kepler-1514 from the Keck I telescope using the High Resolution Echelle Spectrometer. From these data, we measure the mass of the statistically validated giant (1.108 ± 0.023 RJ) exoplanet Kepler-1514 b with a 218-day orbital period as 5.28 ± 0.22 MJ. The bulk density of this cool (∼390 K) giant planet is ${4.82}_{-0.25}^{+0.26}$ g cm-3, consistent with a core supported by electron degeneracy pressure. We also infer an orbital eccentricity of ${0.401}_{-0.014}^{+0.013}$ from the RV and transit observations, which is consistent with planet-planet scattering and disk cavity migration models. The Kepler-1514 system contains an Earth-size, Kepler Object of Interest on a 10.5-day orbit that we statistically validate against false-positive scenarios, including those involving a neighboring star. The combination of the brightness (V = 11.8) of the host star and the long period, low irradiation, and high density of Kepler-1514 b places this system among a rare group of known exoplanetary systems and as one that is amenable to continued study. * Some of the data presented herein were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation.
TESS Delivers Five New Hot Giant Planets Orbiting Bright Stars from the Full-frame ImagesRodriguez, Joseph E.Quinn, Samuel N.Zhou, GeorgeVanderburg, AndrewNielsen, Louise D.Wittenmyer, Robert A.Brahm, RafaelReed, Phillip A.Huang, Chelsea X.Vach, SydneyCiardi, David R.Oelkers, Ryan J.Stassun, Keivan G.Hellier, CoelGaudi, B. ScottEastman, Jason D.Collins, Karen A.Bieryla, AllysonChristian, SamLatham, David W.Carleo, IlariaWright, Duncan J.Matthews, ElisabethGonzales, Erica J.Ziegler, CarlDressing, Courtney D.Howell, Steve B.Tan, Thiam-GuanWittrock, JustinPlavchan, PeterMcLeod, Kim K.Baker, DavidWang, GavinRadford, Don J.Schwarz, Richard P.Esposito, MassimilianoRicker, George R.Vanderspek, Roland K.Seager, SaraWinn, Joshua N.Jenkins, Jon M.Addison, BrettAnderson, D. R.Barclay, ThomasBeatty, Thomas G.Berlind, PerryBouchy, FrancoisBowen, MichaelBowler, Brendan P.Brasseur, C. E.Briceño, CésarCaldwell, Douglas A.Calkins, Michael L.Cartwright, ScottChaturvedi, PriyankaChaverot, GuillaumeChimaladinne, SudhishChristiansen, Jessie L.Collins, Kevin I.Crossfield, Ian J. M.Eastridge, KevinEspinoza, NéstorEsquerdo, Gilbert A.Feliz, Dax L.Fenske, TylerFong, WilliamGan, TianjunGiacalone, StevenGill, HoldenGordon, LindseyGranados, A.Grieves, NolanGuenther, Eike W.Guerrero, NataliaHenning, ThomasHenze, Christopher E.Hesse, KatharineHobson, Melissa J.Horner, JonathanJames, David J.Jensen, Eric L. N.Jimenez, MaryJordán, AndrésKane, Stephen R.Kielkopf, JohnKim, KingsleyKuhn, Rudolf B.Latouf, NatashaLaw, Nicholas M.Levine, Alan M.Lund, Michael B.Mann, Andrew W.Mao, ShudeMatson, Rachel A.Mengel, Matthew W.Mink, JessicaNewman, PatrickO'Dwyer, TannerOkumura, JackPalle, EnricPepper, JoshuaQuintana, Elisa V.Sarkis, PaulaSavel, Arjun B.Schlieder, Joshua E.Schnaible, ChloeShporer, AviSefako, RamotholoSeidel, Julia V.Siverd, Robert J.Skinner, BrettStalport, ManuStevens, Daniel J.Stibbards, CaitlinTinney, C. G.West, R. G.Yahalomi, Daniel A.Zhang, HuiDOI: info:10.3847/1538-3881/abe38av. 161194
Rodriguez, Joseph E., Quinn, Samuel N., Zhou, George, Vanderburg, Andrew, Nielsen, Louise D., Wittenmyer, Robert A., Brahm, Rafael, Reed, Phillip A., Huang, Chelsea X., Vach, Sydney, Ciardi, David R., Oelkers, Ryan J., Stassun, Keivan G., Hellier, Coel, Gaudi, B. Scott, Eastman, Jason D., Collins, Karen A., Bieryla, Allyson, Christian, Sam, Latham, David W., Carleo, Ilaria, Wright, Duncan J., Matthews, Elisabeth, Gonzales, Erica J., Ziegler, Carl et al. 2021. "TESS Delivers Five New Hot Giant Planets Orbiting Bright Stars from the Full-frame Images." The Astronomical Journal 161:194. https://doi.org/10.3847/1538-3881/abe38a
ID: 159316
Type: article
Authors: Rodriguez, Joseph E.; Quinn, Samuel N.; Zhou, George; Vanderburg, Andrew; Nielsen, Louise D.; Wittenmyer, Robert A.; Brahm, Rafael; Reed, Phillip A.; Huang, Chelsea X.; Vach, Sydney; Ciardi, David R.; Oelkers, Ryan J.; Stassun, Keivan G.; Hellier, Coel; Gaudi, B. Scott; Eastman, Jason D.; Collins, Karen A.; Bieryla, Allyson; Christian, Sam; Latham, David W.; Carleo, Ilaria; Wright, Duncan J.; Matthews, Elisabeth; Gonzales, Erica J.; Ziegler, Carl; Dressing, Courtney D.; Howell, Steve B.; Tan, Thiam-Guan; Wittrock, Justin; Plavchan, Peter; McLeod, Kim K.; Baker, David; Wang, Gavin; Radford, Don J.; Schwarz, Richard P.; Esposito, Massimiliano; Ricker, George R.; Vanderspek, Roland K.; Seager, Sara; Winn, Joshua N.; Jenkins, Jon M.; Addison, Brett; Anderson, D. R.; Barclay, Thomas; Beatty, Thomas G.; Berlind, Perry; Bouchy, Francois; Bowen, Michael; Bowler, Brendan P.; Brasseur, C. E.; Briceño, César; Caldwell, Douglas A.; Calkins, Michael L.; Cartwright, Scott; Chaturvedi, Priyanka; Chaverot, Guillaume; Chimaladinne, Sudhish; Christiansen, Jessie L.; Collins, Kevin I.; Crossfield, Ian J. M.; Eastridge, Kevin; Espinoza, Néstor; Esquerdo, Gilbert A.; Feliz, Dax L.; Fenske, Tyler; Fong, William; Gan, Tianjun; Giacalone, Steven; Gill, Holden; Gordon, Lindsey; Granados, A.; Grieves, Nolan; Guenther, Eike W.; Guerrero, Natalia; Henning, Thomas; Henze, Christopher E.; Hesse, Katharine; Hobson, Melissa J.; Horner, Jonathan; James, David J.; Jensen, Eric L. N.; Jimenez, Mary; Jordán, Andrés; Kane, Stephen R.; Kielkopf, John; Kim, Kingsley; Kuhn, Rudolf B.; Latouf, Natasha; Law, Nicholas M.; Levine, Alan M.; Lund, Michael B.; Mann, Andrew W.; Mao, Shude; Matson, Rachel A.; Mengel, Matthew W.; Mink, Jessica; Newman, Patrick; O'Dwyer, Tanner; Okumura, Jack; Palle, Enric; Pepper, Joshua; Quintana, Elisa V.; Sarkis, Paula; Savel, Arjun B.; Schlieder, Joshua E.; Schnaible, Chloe; Shporer, Avi; Sefako, Ramotholo; Seidel, Julia V.; Siverd, Robert J.; Skinner, Brett; Stalport, Manu; Stevens, Daniel J.; Stibbards, Caitlin; Tinney, C. G.; West, R. G.; Yahalomi, Daniel A.; Zhang, Hui
Abstract: We present the discovery and characterization of five hot and warm Jupiters-TOI-628 b (TIC 281408474; HD 288842), TOI-640 b (TIC 147977348), TOI-1333 b (TIC 395171208, BD+47 3521A), TOI-1478 b (TIC 409794137), and TOI-1601 b (TIC 139375960)-based on data from NASA's Transiting Exoplanet Survey Satellite (TESS). The five planets were identified from the full-frame images and were confirmed through a series of photometric and spectroscopic follow-up observations by the TESS Follow-up Observing Program Working Group. The planets are all Jovian size (RP = 1.01-1.77 RJ) and have masses that range from 0.85 to 6.33 MJ. The host stars of these systems have F and G spectral types (5595 ≤ Teff ≤ 6460 K) and are all relatively bright (9.5 ≤ 6460 K) and are all relatively bright (9.5 ≤ 6460 K) and are all relatively bright (9.5 ≤ 6460 K) and are all relatively bright (9.5 ≤ 6460 K) and are all relatively bright (9.5 ≤ 6460 K) and are all relatively bright (9.5 P > 1.7 RJ, possibly a result of its host star's evolution) and resides on an orbit with a period longer than 5 days. TOI-628 b is the most massive, hot Jupiter discovered to date by TESS with a measured mass of ${6.31}_{-0.30}^{+0.28}$ MJ and a statistically significant, nonzero orbital eccentricity of e = ${0.074}_{-0.022}^{+0.021}$ . This planet would not have had enough time to circularize through tidal forces from our analysis, suggesting that it might be remnant eccentricity from its migration. The longest-period planet in this sample, TOI-1478 b (P = 10.18 days), is a warm Jupiter in a circular orbit around a near-solar analog. NASA's TESS mission is continuing to increase the sample of well-characterized hot and warm Jupiters, complementing its primary mission goals.
A hot terrestrial planet orbiting the bright M dwarf L 168-9 unveiled by TESSAstudillo-Defru, N.Cloutier, RyanWang, S. X.Teske, J.Brahm, R.Hellier, C.Ricker, G.Vanderspek, R.Latham, DavidSeager, S.Winn, J. N.Jenkins, J. M.Collins, Karen A.Stassun, K. G.Ziegler, C.Almenara, J. M.Anderson, D. R.Artigau, E.Bonfils, X.Bouchy, F.Briceño, C.Butler, R. P.Charbonneau, DavidConti, D. M.Crane, J.Crossfield, I. J. M.Davies, M.Delfosse, X.Díaz, R. F.Doyon, R.Dragomir, D.Eastman, Jason D.Espinoza, N.Essack, Z.Feng, F.Figueira, P.Forveille, T.Gan, T.Glidden, A.Guerrero, N.Hart, R.Henning, ThHorch, E. P.Isopi, G.Jenkins, J. S.Jordán, A.Kielkopf, J. F.Law, N.Lovis, C.Mallia, F.Mann, A. W.de Medeiros, J. R.Melo, C.Mennickent, R. E.Mignon, L.Murgas, F.Nusdeo, D. A.Pepe, F.Relles, Howard M.Rose, M.Santos, N. C.Ségransan, D.Shectman, S.Shporer, A.Smith, J. C.Torres, P.Udry, S.Villasenor, J.Winters, Jennifer G.Zhou, GeorgeDOI: info:10.1051/0004-6361/201937179v. 636A58
Astudillo-Defru, N., Cloutier, Ryan, Wang, S. X., Teske, J., Brahm, R., Hellier, C., Ricker, G., Vanderspek, R., Latham, David, Seager, S., Winn, J. N., Jenkins, J. M., Collins, Karen A., Stassun, K. G., Ziegler, C., Almenara, J. M., Anderson, D. R., Artigau, E., Bonfils, X., Bouchy, F., Briceño, C., Butler, R. P., Charbonneau, David, Conti, D. M., Crane, J. et al. 2020. "A hot terrestrial planet orbiting the bright M dwarf L 168-9 unveiled by TESS." Astronomy and Astrophysics 636:A58. https://doi.org/10.1051/0004-6361/201937179
ID: 157118
Type: article
Authors: Astudillo-Defru, N.; Cloutier, Ryan; Wang, S. X.; Teske, J.; Brahm, R.; Hellier, C.; Ricker, G.; Vanderspek, R.; Latham, David; Seager, S.; Winn, J. N.; Jenkins, J. M.; Collins, Karen A.; Stassun, K. G.; Ziegler, C.; Almenara, J. M.; Anderson, D. R.; Artigau, E.; Bonfils, X.; Bouchy, F.; Briceño, C.; Butler, R. P.; Charbonneau, David; Conti, D. M.; Crane, J.; Crossfield, I. J. M.; Davies, M.; Delfosse, X.; Díaz, R. F.; Doyon, R.; Dragomir, D.; Eastman, Jason D.; Espinoza, N.; Essack, Z.; Feng, F.; Figueira, P.; Forveille, T.; Gan, T.; Glidden, A.; Guerrero, N.; Hart, R.; Henning, Th; Horch, E. P.; Isopi, G.; Jenkins, J. S.; Jordán, A.; Kielkopf, J. F.; Law, N.; Lovis, C.; Mallia, F.; Mann, A. W.; de Medeiros, J. R.; Melo, C.; Mennickent, R. E.; Mignon, L.; Murgas, F.; Nusdeo, D. A.; Pepe, F.; Relles, Howard M.; Rose, M.; Santos, N. C.; Ségransan, D.; Shectman, S.; Shporer, A.; Smith, J. C.; Torres, P.; Udry, S.; Villasenor, J.; Winters, Jennifer G.; Zhou, George
Abstract: We report the detection of a transiting super-Earth-sized planet (R = 1.39 ± 0.09 R) in a 1.4-day orbit around L 168-9 (TOI-134), a bright M1V dwarf (V = 11, K = 7.1) located at 25.15 ± 0.02 pc. The host star was observed in the first sector of the Transiting Exoplanet Survey Satellite (TESS) mission. For confirmation and planet mass measurement purposes, this was followed up with ground-based photometry, seeing-limited and high-resolution imaging, and precise radial velocity (PRV) observations using the HARPS and Magellan/PFS spectrographs. By combining the TESS data and PRV observations, we find the mass of L 168-9 b to be 4.60 ± 0.56 M and thus the bulk density to be 1.74-0.33+0.44 times higher than that of the Earth. The orbital eccentricity is smaller than 0.21 (95% confidence). This planet is a level one candidate for the TESS mission's scientific objective of measuring the masses of 50 small planets, and it is one of the most observationally accessible terrestrial planets for future atmospheric characterization.
Full Tables B.1 and B.2 are only available at the CDS via anonymous ftp to http://cdsarc.u-strasbg.fr (ftp://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz- bin/cat/J/A+A/636/A58.
Partially based on observations made with the HARPS instrument on the ESO 3.6 m telescope under the program IDs 198.C-0838(A), 0101.C-0510(C), and 1102.C-0339(A) at Cerro La Silla (Chile).
This paper includes data gathered with the 6.5 m Magellan Telescopes located at Las Campanas Observatory, Chile.
TOI-824 b: A New Planet on the Lower Edge of the Hot Neptune DesertBurt, Jennifer A.Nielsen, Louise D.Quinn, Samuel N.Mamajek, Eric E.Matthews, Elisabeth C.Zhou, GeorgeSeidel, Julia V.Huang, Chelsea X.Lopez, EricSoto, MaritzaOtegi, JonStassun, Keivan G.Kreidberg, LauraCollins, Karen A.Eastman, Jason D.Rodriguez, Joseph E.Vanderburg, AndrewHalverson, Samuel P.Teske, Johanna K.Wang, Sharon X.Butler, R. PaulBouchy, FrançoisDumusque, XavierSegransen, DamienShectman, Stephen A.Crane, Jeffrey D.Feng, FaboMontet, Benjamin T.Feinstein, Adina D.Beletski, YuriFlowers, ErinGünther, Maximilian N.Daylan, TansuCollins, Kevin I.Conti, Dennis M.Gan, TianjunJensen, Eric L. N.Kielkopf, John F.Tan, Thiam-GuanHelled, RavitDorn, CarolineHaldemann, JonasLissauer, Jack J.Ricker, George R.Vanderspek, RolandLatham, David W.Seager, S.Winn, Joshua N.Jenkins, Jon M.Twicken, Joseph D.Smith, Jeffrey C.Tenenbaum, PeterCartwright, ScottBarclay, ThomasPepper, JoshuaEsquerdo, GilbertFong, WilliamDOI: info:10.3847/1538-3881/abac0cv. 160153
Burt, Jennifer A., Nielsen, Louise D., Quinn, Samuel N., Mamajek, Eric E., Matthews, Elisabeth C., Zhou, George, Seidel, Julia V., Huang, Chelsea X., Lopez, Eric, Soto, Maritza, Otegi, Jon, Stassun, Keivan G., Kreidberg, Laura, Collins, Karen A., Eastman, Jason D., Rodriguez, Joseph E., Vanderburg, Andrew, Halverson, Samuel P., Teske, Johanna K., Wang, Sharon X., Butler, R. Paul, Bouchy, François, Dumusque, Xavier, Segransen, Damien, Shectman, Stephen A. et al. 2020. "TOI-824 b: A New Planet on the Lower Edge of the Hot Neptune Desert." The Astronomical Journal 160:153. https://doi.org/10.3847/1538-3881/abac0c
ID: 157601
Type: article
Authors: Burt, Jennifer A.; Nielsen, Louise D.; Quinn, Samuel N.; Mamajek, Eric E.; Matthews, Elisabeth C.; Zhou, George; Seidel, Julia V.; Huang, Chelsea X.; Lopez, Eric; Soto, Maritza; Otegi, Jon; Stassun, Keivan G.; Kreidberg, Laura; Collins, Karen A.; Eastman, Jason D.; Rodriguez, Joseph E.; Vanderburg, Andrew; Halverson, Samuel P.; Teske, Johanna K.; Wang, Sharon X.; Butler, R. Paul; Bouchy, François; Dumusque, Xavier; Segransen, Damien; Shectman, Stephen A.; Crane, Jeffrey D.; Feng, Fabo; Montet, Benjamin T.; Feinstein, Adina D.; Beletski, Yuri; Flowers, Erin; Günther, Maximilian N.; Daylan, Tansu; Collins, Kevin I.; Conti, Dennis M.; Gan, Tianjun; Jensen, Eric L. N.; Kielkopf, John F.; Tan, Thiam-Guan; Helled, Ravit; Dorn, Caroline; Haldemann, Jonas; Lissauer, Jack J.; Ricker, George R.; Vanderspek, Roland; Latham, David W.; Seager, S.; Winn, Joshua N.; Jenkins, Jon M.; Twicken, Joseph D.; Smith, Jeffrey C.; Tenenbaum, Peter; Cartwright, Scott; Barclay, Thomas; Pepper, Joshua; Esquerdo, Gilbert; Fong, William
Abstract: We report the detection of a transiting hot Neptune exoplanet orbiting TOI-824 (SCR J1448-5735), a nearby (d = 64 pc) K4V star, using data from the Transiting Exoplanet Survey Satellite. The newly discovered planet has a radius Rp = 2.93 ± 0.20 ${R}_{\oplus }$ and an orbital period of 1.393 days. Radial velocity measurements using the Planet Finder Spectrograph and the High Accuracy Radial velocity Planet Searcher spectrograph confirm the existence of the planet, and we estimate its mass to be 18.47 ± 1.84 ${M}_{\oplus }$ . The planet's mean density is ${\rho }_{{\rm{p}}}$ = 4.03 ${}_{-0.78}^{+0.98}$ ${\rm{g}}\,{\mathrm{cm}}^{-3}$ , making it more than twice as dense as Neptune. TOI-824 b's high equilibrium temperature makes the planet likely to have a cloud-free atmosphere, and thus it is an excellent candidate for follow-up atmospheric studies. The detectability of TOI-824 b's atmosphere from both ground and space is promising and could lead to the detailed characterization of the most irradiated small planet at the edge of the hot Neptune desert that has retained its atmosphere to date.
A Pair of TESS Planets Spanning the Radius Valley around the Nearby Mid-M Dwarf LTT 3780Cloutier, RyanEastman, Jason D.Rodriguez, Joseph E.Astudillo-Defru, NicolaBonfils, XavierMortier, AnneliesWatson, Christopher A.Stalport, ManuPinamonti, MatteoLienhard, FlorianHarutyunyan, AvetDamasso, MarioLatham, David W.Collins, Karen A.Massey, RobertIrwin, JonathanWinters, Jennifer G.Charbonneau, DavidZiegler, CarlMatthews, ElisabethCrossfield, Ian J. M.Kreidberg, LauraQuinn, Samuel N.Ricker, GeorgeVanderspek, RolandSeager, SaraWinn, JoshuaJenkins, Jon M.Vezie, MichaelUdry, StéphaneTwicken, Joseph D.Tenenbaum, PeterSozzetti, AlessandroSégransan, DamienSchlieder, Joshua E.Sasselov, DimitarSantos, Nuno C.Rice, KenRackham, Benjamin V.Poretti, EnnioPiotto, GiampaoloPhillips, DavidPepe, FrancescoMolinari, EmilioMignon, LucileMicela, GiuseppinaMelo, Claudiode Medeiros, José R.Mayor, MichelMatson, Rachel A.Martinez Fiorenzano, Aldo F.Mann, Andrew W.Magazzú, AntonioLovis, ChristopheLópez-Morales, MercedesLopez, EricLissauer, Jack J.Lépine, SébastienLaw, NicholasKielkopf, John F.Johnson, John A.Jensen, Eric L. N.Howell, Steve B.Gonzales, EricaGhedina, AdrianoForveille, ThierryFigueira, PedroDumusque, XavierDressing, Courtney D.Doyon, RenéDíaz, Rodrigo F.Fabrizio, Luca DiDelfosse, XavierCosentino, RosarioConti, Dennis M.Collins, Kevin I.Cameron, Andrew CollierCiardi, DavidCaldwell, Douglas A.Burke, ChristopherBuchhave, LarsBriceño, CésarBoyd, PatriciaBouchy, FrançoisBeichman, CharlesArtigau, ÉtienneAlmenara, Jose M.DOI: info:10.3847/1538-3881/ab91c2v. 160No. 13
Cloutier, Ryan, Eastman, Jason D., Rodriguez, Joseph E., Astudillo-Defru, Nicola, Bonfils, Xavier, Mortier, Annelies, Watson, Christopher A., Stalport, Manu, Pinamonti, Matteo, Lienhard, Florian, Harutyunyan, Avet, Damasso, Mario, Latham, David W., Collins, Karen A., Massey, Robert, Irwin, Jonathan, Winters, Jennifer G., Charbonneau, David, Ziegler, Carl, Matthews, Elisabeth, Crossfield, Ian J. M., Kreidberg, Laura, Quinn, Samuel N., Ricker, George, Vanderspek, Roland et al. 2020. "A Pair of TESS Planets Spanning the Radius Valley around the Nearby Mid-M Dwarf LTT 3780." The Astronomical Journal 160 (1):3. https://doi.org/10.3847/1538-3881/ab91c2
ID: 157584
Type: article
Authors: Cloutier, Ryan; Eastman, Jason D.; Rodriguez, Joseph E.; Astudillo-Defru, Nicola; Bonfils, Xavier; Mortier, Annelies; Watson, Christopher A.; Stalport, Manu; Pinamonti, Matteo; Lienhard, Florian; Harutyunyan, Avet; Damasso, Mario; Latham, David W.; Collins, Karen A.; Massey, Robert; Irwin, Jonathan; Winters, Jennifer G.; Charbonneau, David; Ziegler, Carl; Matthews, Elisabeth; Crossfield, Ian J. M.; Kreidberg, Laura; Quinn, Samuel N.; Ricker, George; Vanderspek, Roland; Seager, Sara; Winn, Joshua; Jenkins, Jon M.; Vezie, Michael; Udry, Stéphane; Twicken, Joseph D.; Tenenbaum, Peter; Sozzetti, Alessandro; Ségransan, Damien; Schlieder, Joshua E.; Sasselov, Dimitar; Santos, Nuno C.; Rice, Ken; Rackham, Benjamin V.; Poretti, Ennio; Piotto, Giampaolo; Phillips, David; Pepe, Francesco; Molinari, Emilio; Mignon, Lucile; Micela, Giuseppina; Melo, Claudio; de Medeiros, José R.; Mayor, Michel; Matson, Rachel A.; Martinez Fiorenzano, Aldo F.; Mann, Andrew W.; Magazzú, Antonio; Lovis, Christophe; López-Morales, Mercedes; Lopez, Eric; Lissauer, Jack J.; Lépine, Sébastien; Law, Nicholas; Kielkopf, John F.; Johnson, John A.; Jensen, Eric L. N.; Howell, Steve B.; Gonzales, Erica; Ghedina, Adriano; Forveille, Thierry; Figueira, Pedro; Dumusque, Xavier; Dressing, Courtney D.; Doyon, René; Díaz, Rodrigo F.; Fabrizio, Luca Di; Delfosse, Xavier; Cosentino, Rosario; Conti, Dennis M.; Collins, Kevin I.; Cameron, Andrew Collier; Ciardi, David; Caldwell, Douglas A.; Burke, Christopher; Buchhave, Lars; Briceño, César; Boyd, Patricia; Bouchy, François; Beichman, Charles; Artigau, Étienne; Almenara, Jose M.
Abstract: We present the confirmation of two new planets transiting the nearby mid-M dwarf LTT 3780 (TIC 36724087, TOI-732, V = 13.07, Ks = 8.204, Rs = 0.374 R, Ms = 0.401 M, d = 22 pc). The two planet candidates are identified in a single Transiting Exoplanet Survey Satellite sector and validated with reconnaissance spectroscopy, ground-based photometric follow-up, and high-resolution imaging. With measured orbital periods of Pb = 0.77, Pc = 12.25 days and sizes rp,b = 1.33 ± 0.07, rp,c = 2.30 ± 0.16 R, the two planets span the radius valley in period-radius space around low-mass stars, thus making the system a laboratory to test competing theories of the emergence of the radius valley in that stellar mass regime. By combining 63 precise radial velocity measurements from the High Accuracy Radial velocity Planet Searcher (HARPS) and HARPS-N, we measure planet masses of ${m}_{p,b}={2.62}_{-0.46}^{+0.48}$ and ${m}_{p,c}={8.6}_{-1.3}^{+1.6}$ M, which indicates that LTT 3780b has a bulk composition consistent with being Earth-like, while LTT 3780c likely hosts an extended H/He envelope. We show that the recovered planetary masses are consistent with predictions from both photoevaporation and core-powered mass-loss models. The brightness and small size of LTT 3780, along with the measured planetary parameters, render LTT 3780b and c as accessible targets for atmospheric characterization of planets within the same planetary system and spanning the radius valley.
TOI 564 b and TOI 905 b: Grazing and Fully Transiting Hot Jupiters Discovered by TESSDavis, Allen B.Wang, SonghuJones, MatiasEastman, Jason D.Günther, Maximilian N.Stassun, Keivan G.Addison, Brett C.Collins, Karen A.Quinn, Samuel N.Latham, David W.Trifonov, TrifonShahaf, SaharMazeh, TseviKane, Stephen R.Narita, NorioWang, Xian-YuTan, Thiam-GuanCiardi, David R.Tokovinin, AndreiZiegler, CarlTronsgaard, RenéMillholland, SarahCruz, BryndisBerlind, PerryCalkins, Michael L.Esquerdo, Gilbert A.Collins, Kevin I.Conti, Dennis M.Murgas, FelipeEvans, PhilLewin, PabloRadford, Don J.Paredes, Leonardo A.Henry, Todd J.Hodari-Sadiki, JamesLund, Michael B.Christiansen, Jessie L.Law, Nicholas M.Mann, Andrew W.Briceño, CésarParviainen, HannuPalle, EnricWatanabe, NoriharuRicker, George R.Vanderspek, RolandSeager, SaraWinn, Joshua N.Jenkins, Jon M.Krishnamurthy, AkshataBatalha, Natalie M.Burt, JenniferColón, Knicole D.Dynes, ScottCaldwell, Douglas A.Morris, RobertHenze, Christopher E.Fischer, Debra A.DOI: info:10.3847/1538-3881/aba49dv. 160229
Davis, Allen B., Wang, Songhu, Jones, Matias, Eastman, Jason D., Günther, Maximilian N., Stassun, Keivan G., Addison, Brett C., Collins, Karen A., Quinn, Samuel N., Latham, David W., Trifonov, Trifon, Shahaf, Sahar, Mazeh, Tsevi, Kane, Stephen R., Narita, Norio, Wang, Xian-Yu, Tan, Thiam-Guan, Ciardi, David R., Tokovinin, Andrei, Ziegler, Carl, Tronsgaard, René, Millholland, Sarah, Cruz, Bryndis, Berlind, Perry, Calkins, Michael L. et al. 2020. "TOI 564 b and TOI 905 b: Grazing and Fully Transiting Hot Jupiters Discovered by TESS." The Astronomical Journal 160:229. https://doi.org/10.3847/1538-3881/aba49d
ID: 158650
Type: article
Authors: Davis, Allen B.; Wang, Songhu; Jones, Matias; Eastman, Jason D.; Günther, Maximilian N.; Stassun, Keivan G.; Addison, Brett C.; Collins, Karen A.; Quinn, Samuel N.; Latham, David W.; Trifonov, Trifon; Shahaf, Sahar; Mazeh, Tsevi; Kane, Stephen R.; Narita, Norio; Wang, Xian-Yu; Tan, Thiam-Guan; Ciardi, David R.; Tokovinin, Andrei; Ziegler, Carl; Tronsgaard, René; Millholland, Sarah; Cruz, Bryndis; Berlind, Perry; Calkins, Michael L.; Esquerdo, Gilbert A.; Collins, Kevin I.; Conti, Dennis M.; Murgas, Felipe; Evans, Phil; Lewin, Pablo; Radford, Don J.; Paredes, Leonardo A.; Henry, Todd J.; Hodari-Sadiki, James; Lund, Michael B.; Christiansen, Jessie L.; Law, Nicholas M.; Mann, Andrew W.; Briceño, César; Parviainen, Hannu; Palle, Enric; Watanabe, Noriharu; Ricker, George R.; Vanderspek, Roland; Seager, Sara; Winn, Joshua N.; Jenkins, Jon M.; Krishnamurthy, Akshata; Batalha, Natalie M.; Burt, Jennifer; Colón, Knicole D.; Dynes, Scott; Caldwell, Douglas A.; Morris, Robert; Henze, Christopher E.; Fischer, Debra A.
Abstract: We report the discovery and confirmation of two new hot Jupiters discovered by the Transiting Exoplanet Survey Satellite (TESS): TOI 564 b and TOI 905 b. The transits of these two planets were initially observed by TESS with orbital periods of 1.651 and 3.739 days, respectively. We conducted follow-up observations of each system from the ground, including photometry in multiple filters, speckle interferometry, and radial velocity measurements. For TOI 564 b, our global fitting revealed a classical hot Jupiter with a mass of ${1.463}_{-0.096}^{+0.10}$ MJ and a radius of ${1.02}_{-0.29}^{+0.71}$ RJ. Also a classical hot Jupiter, TOI 905 b has a mass of ${0.667}_{-0.041}^{+0.042}$ MJ and radius of ${1.171}_{-0.051}^{+0.053}$ RJ. Both planets orbit Sun-like, moderately bright, mid-G dwarf stars with V ˜ 11. While TOI 905 b fully transits its star, we found that TOI 564 b has a very high transit impact parameter of ${0.994}_{-0.049}^{+0.083}$ , making it one of only ˜20 known systems to exhibit a grazing transit and one of the brightest host stars among them. Therefore, TOI 564 b is one of the most attractive systems to search for additional nontransiting, smaller planets by exploiting the sensitivity of grazing transits to small changes in inclination and transit duration over a timescale of several years.
The K2 and TESS Synergy. I. Updated Ephemerides and Parameters for K2-114, K2-167, K2-237, and K2-261Ikwut-Ukwa, MmaRodriguez, Joseph E.Bieryla, AllysonVanderburg, AndrewMocnik, TeoKane, Stephen R.Quinn, Samuel N.Colón, Knicole D.Zhou, GeorgeEastman, Jason D.Huang, Chelsea X.Latham, David W.Dotson, JessieJenkins, Jon M.Ricker, George R.Seager, SaraVanderspek, Roland K.Winn, Joshua N.Barclay, ThomasBarentsen, GeertBerta-Thompson, ZachoryCharbonneau, DavidDragomir, DianaDaylan, TansuGünther, Maximilian N.Hedges, ChristinaHenze, Christopher E.McDermott, ScottSchlieder, Joshua E.Quintana, Elisa V.Smith, Jeffrey C.Twicken, Joseph D.Yahalomi, Daniel A.DOI: info:10.3847/1538-3881/aba964v. 160209
Ikwut-Ukwa, Mma, Rodriguez, Joseph E., Bieryla, Allyson, Vanderburg, Andrew, Mocnik, Teo, Kane, Stephen R., Quinn, Samuel N., Colón, Knicole D., Zhou, George, Eastman, Jason D., Huang, Chelsea X., Latham, David W., Dotson, Jessie, Jenkins, Jon M., Ricker, George R., Seager, Sara, Vanderspek, Roland K., Winn, Joshua N., Barclay, Thomas, Barentsen, Geert, Berta-Thompson, Zachory, Charbonneau, David, Dragomir, Diana, Daylan, Tansu, Günther, Maximilian N. et al. 2020. "The K2 and TESS Synergy. I. Updated Ephemerides and Parameters for K2-114, K2-167, K2-237, and K2-261." The Astronomical Journal 160:209. https://doi.org/10.3847/1538-3881/aba964
ID: 158655
Type: article
Authors: Ikwut-Ukwa, Mma; Rodriguez, Joseph E.; Bieryla, Allyson; Vanderburg, Andrew; Mocnik, Teo; Kane, Stephen R.; Quinn, Samuel N.; Colón, Knicole D.; Zhou, George; Eastman, Jason D.; Huang, Chelsea X.; Latham, David W.; Dotson, Jessie; Jenkins, Jon M.; Ricker, George R.; Seager, Sara; Vanderspek, Roland K.; Winn, Joshua N.; Barclay, Thomas; Barentsen, Geert; Berta-Thompson, Zachory; Charbonneau, David; Dragomir, Diana; Daylan, Tansu; Günther, Maximilian N.; Hedges, Christina; Henze, Christopher E.; McDermott, Scott; Schlieder, Joshua E.; Quintana, Elisa V.; Smith, Jeffrey C.; Twicken, Joseph D.; Yahalomi, Daniel A.
Abstract: Although the Transiting Exoplanet Survey Satellite (TESS) primary mission observed the northern and southern ecliptic hemispheres, generally avoiding the ecliptic, and the Kepler space telescope during the K2 mission could only observe near the ecliptic, many of the K2 fields extend far enough from the ecliptic plane that sections overlap with TESS fields. Using photometric observations from both K2 and TESS, combined with archival spectroscopic observations, we globally modeled four known planetary systems discovered by K2 that were observed in the first year of the primary TESS mission. Specifically, we provide updated ephemerides and system parameters for K2-114 b, K2-167 b, K2-237 b, and K2-261 b. These were some of the first K2 planets to be observed by TESS in the first year and include three Jovian sized planets and a sub-Neptune with orbital periods less than 12 days. In each case, the updated ephemeris significantly reduces the uncertainty in prediction of future times of transit, which is valuable for planning observations with the James Webb Space Telescope and other future facilities. The TESS extended mission is expected to observe about half of the K2 fields, providing the opportunity to perform this type of analysis on a larger number of systems.
TOI-677b: A Warm Jupiter (P = 11.2 days) on an Eccentric Orbit Transiting a Late F-type StarJordán, AndrésBrahm, RafaelEspinoza, NéstorHenning, ThomasJones, Matías I.Kossakowski, DianaSarkis, PaulaTrifonov, TrifonRojas, FelipeTorres, PascalDrass, HolgerNandakumar, SangeethaBarbieri, MauroDavis, AllenWang, SonghuBayliss, DanielBouma, LukeDragomir, DianaEastman, Jason D.Daylan, TansuGuerrero, NataliaBarclay, ThomasTing, Eric B.Henze, Christopher E.Ricker, GeorgeVanderspek, RolandLatham, David W.Seager, SaraWinn, JoshuaJenkins, Jon M.Wittenmyer, Robert A.Bowler, Brendan P.Crossfield, IanHorner, JonathanKane, Stephen R.Kielkopf, John F.Morton, Timothy D.Plavchan, PeterTinney, C. G.Addison, BrettMengel, Matthew W.Okumura, JackShahaf, SaharMazeh, TseviRabus, MarkusShporer, AviZiegler, CarlMann, Andrew W.Hart, RhodesDOI: info:10.3847/1538-3881/ab6f67v. 159145
Jordán, Andrés, Brahm, Rafael, Espinoza, Néstor, Henning, Thomas, Jones, Matías I., Kossakowski, Diana, Sarkis, Paula, Trifonov, Trifon, Rojas, Felipe, Torres, Pascal, Drass, Holger, Nandakumar, Sangeetha, Barbieri, Mauro, Davis, Allen, Wang, Songhu, Bayliss, Daniel, Bouma, Luke, Dragomir, Diana, Eastman, Jason D., Daylan, Tansu, Guerrero, Natalia, Barclay, Thomas, Ting, Eric B., Henze, Christopher E., Ricker, George et al. 2020. "TOI-677b: A Warm Jupiter (P = 11.2 days) on an Eccentric Orbit Transiting a Late F-type Star." The Astronomical Journal 159:145. https://doi.org/10.3847/1538-3881/ab6f67
ID: 156293
Type: article
Authors: Jordán, Andrés; Brahm, Rafael; Espinoza, Néstor; Henning, Thomas; Jones, Matías I.; Kossakowski, Diana; Sarkis, Paula; Trifonov, Trifon; Rojas, Felipe; Torres, Pascal; Drass, Holger; Nandakumar, Sangeetha; Barbieri, Mauro; Davis, Allen; Wang, Songhu; Bayliss, Daniel; Bouma, Luke; Dragomir, Diana; Eastman, Jason D.; Daylan, Tansu; Guerrero, Natalia; Barclay, Thomas; Ting, Eric B.; Henze, Christopher E.; Ricker, George; Vanderspek, Roland; Latham, David W.; Seager, Sara; Winn, Joshua; Jenkins, Jon M.; Wittenmyer, Robert A.; Bowler, Brendan P.; Crossfield, Ian; Horner, Jonathan; Kane, Stephen R.; Kielkopf, John F.; Morton, Timothy D.; Plavchan, Peter; Tinney, C. G.; Addison, Brett; Mengel, Matthew W.; Okumura, Jack; Shahaf, Sahar; Mazeh, Tsevi; Rabus, Markus; Shporer, Avi; Ziegler, Carl; Mann, Andrew W.; Hart, Rhodes
Abstract: We report the discovery of TOI-677 b, first identified as a candidate in light curves obtained within Sectors 9 and 10 of the Transiting Exoplanet Survey Satellite (TESS) mission and confirmed with radial velocities. TOI-677 b has a mass of ${\text{}}{M}_{{\text{}}p} = ${1.236}_{-0.067}^{+0.069} ${\text{}}{M}_{{\rm{J}}}, a radius of ${\text{}}{R}_{{\text{}}P} = $1.170\pm 0.03 ${\text{}}{R}_{{\rm{J}}}, and orbits its bright host star (V = 9.8 mag) with an orbital period of $11.23660\pm 0.00011 d, on an eccentric orbit with $e=0.435\pm 0.024 . The host star has a mass of ${\text{}}{M}_{\star } = $1.181\pm 0.058 ${\text{}}{M}_{\odot }, a radius of ${\text{}}{R}_{\star } = ${1.28}_{-0.03}^{+0.03} ${\text{}}{R}_{\odot }, an age of ${2.92}_{-0.73}^{+0.80} Gyr and solar metallicity, properties consistent with a main-sequence late-F star with ${T}_{\mathrm{eff}}=6295\pm 77 K. We find evidence in the radial velocity measurements of a secondary long-term signal, which could be due to an outer companion. The TOI-677 b system is a well-suited target for Rossiter-Mclaughlin observations that can constrain migration mechanisms of close-in giant planets.
TESS Reveals HD 118203 b to be a Transiting PlanetPepper, JoshuaKane, Stephen R.Rodriguez, Joseph E.Hinkel, Natalie R.Eastman, Jason D.Daylan, TansuMocnik, TeoDalba, Paul A.Gaudi, B. ScottFetherolf, TaraStassun, Keivan G.Campante, Tiago L.Vanderburg, AndrewHuber, DanielBossini, DiegoCrossfield, IanHowell, Steve B.Stephens, Andrew W.Furlan, E.Ricker, George R.Vanderspek, RolandLatham, David W.Seager, S.Winn, Joshua N.Jenkins, Jon M.Twicken, Joseph D.Rose, MarkSmith, Jeffrey C.Glidden, AnaLevine, Alan M.Rinehart, StephenCollins, Karen A.Mann, Andrew W.Burt, Jennifer A.James, David J.Siverd, Robert J.Günther, Maximilian N.DOI: info:10.3847/1538-3881/ab84f2v. 159243
Pepper, Joshua, Kane, Stephen R., Rodriguez, Joseph E., Hinkel, Natalie R., Eastman, Jason D., Daylan, Tansu, Mocnik, Teo, Dalba, Paul A., Gaudi, B. Scott, Fetherolf, Tara, Stassun, Keivan G., Campante, Tiago L., Vanderburg, Andrew, Huber, Daniel, Bossini, Diego, Crossfield, Ian, Howell, Steve B., Stephens, Andrew W., Furlan, E., Ricker, George R., Vanderspek, Roland, Latham, David W., Seager, S., Winn, Joshua N., Jenkins, Jon M. et al. 2020. "TESS Reveals HD 118203 b to be a Transiting Planet." The Astronomical Journal 159:243. https://doi.org/10.3847/1538-3881/ab84f2
ID: 156881
Type: article
Authors: Pepper, Joshua; Kane, Stephen R.; Rodriguez, Joseph E.; Hinkel, Natalie R.; Eastman, Jason D.; Daylan, Tansu; Mocnik, Teo; Dalba, Paul A.; Gaudi, B. Scott; Fetherolf, Tara; Stassun, Keivan G.; Campante, Tiago L.; Vanderburg, Andrew; Huber, Daniel; Bossini, Diego; Crossfield, Ian; Howell, Steve B.; Stephens, Andrew W.; Furlan, E.; Ricker, George R.; Vanderspek, Roland; Latham, David W.; Seager, S.; Winn, Joshua N.; Jenkins, Jon M.; Twicken, Joseph D.; Rose, Mark; Smith, Jeffrey C.; Glidden, Ana; Levine, Alan M.; Rinehart, Stephen; Collins, Karen A.; Mann, Andrew W.; Burt, Jennifer A.; James, David J.; Siverd, Robert J.; Günther, Maximilian N.
Abstract: The exoplanet HD 118203 b, orbiting a bright (V = 8.05) host star, was discovered using the radial velocity method by da Silva et al., but was not previously known to transit. Transiting Exoplanet Survey Satellite (TESS) photometry has revealed that this planet transits its host star. Nine planetary transits were observed by TESS, allowing us to measure the radius of the planet to be ${1.136}_{-0.028}^{+0.029}{R}_{J}$ , and to calculate the planet mass to be ${2.166}_{-0.079}^{+0.074}{M}_{J}$ . The host star is slightly evolved with an effective temperature of ${T}_{\mathrm{eff}}={5683}_{-85}^{+84}$ K and a surface gravity of $\mathrm{log}\,g={3.889}_{0.018}^{0.017}$ . With an orbital period of ${6.134985}_{-0.000030}^{+0.000029}$ days and an eccentricity of 0.314 ± 0.017, the planet occupies a transitional regime between circularized hot Jupiters and more dynamically active planets at longer orbital periods. The host star is among the 10 brightest known to have transiting giant planets, providing opportunities for both planetary atmospheric and asteroseismic studies.
KELT-25 b and KELT-26 b: A Hot Jupiter and a Substellar Companion Transiting Young A Stars Observed by TESSRodríguez Martínez, RomyGaudi, B. ScottRodriguez, Joseph E.Zhou, GeorgeLabadie-Bartz, JonathanQuinn, Samuel N.Penev, KaloyanTan, Thiam-GuanLatham, David W.Paredes, Leonardo A.Kielkopf, John F.Addison, BrettWright, Duncan J.Teske, JohannaHowell, Steve B.Ciardi, DavidZiegler, CarlStassun, Keivan G.Johnson, Marshall C.Eastman, Jason D.Siverd, Robert J.Beatty, Thomas G.Bouma, LukeBedding, TimothyPepper, JoshuaWinn, JoshuaLund, Michael B.Villanueva, Steven, Jr.Stevens, Daniel J.Jensen, Eric L. N.Kilby, ColemanCrane, Jeffrey D.Tokovinin, AndreiEverett, Mark E.Tinney, C. G.Fausnaugh, MichaelCohen, David H.Bayliss, DanielBieryla, AllysonCargile, Phillip A.Collins, Karen A.Conti, Dennis M.Colón, Knicole D.Curtis, Ivan A.DePoy, D. L.Evans, PhilFeliz, Dax L.Gregorio, JoaoRothenberg, JasonJames, David J.Joner, Michael D.Kuhn, Rudolf B.Manner, MarkKhakpash, SomayehMarshall, Jennifer L.McLeod, Kim K.Penny, Matthew T.Reed, Phillip A.Relles, Howard M.Stephens, Denise C.Stockdale, ChrisTrueblood, MarkTrueblood, PatYao, XinyuZambelli, RobertoVanderspek, RolandSeager, SaraJenkins, Jon M.Henry, Todd J.James, Hodari-SadikiJao, Wei-ChunWang, Sharon XuesongButler, PaulThompson, IanShectman, StephenWittenmyer, RobertBowler, Brendan P.Horner, JonathanKane, Stephen R.Mengel, Matthew W.Morton, Timothy D.Okumura, JackPlavchan, PeterZhang, HuiScott, Nicholas J.Matson, Rachel A.Mann, Andrew W.Dragomir, DianaGünther, MaxTing, Eric B.Glidden, AnaQuintana, Elisa V.DOI: info:10.3847/1538-3881/ab9f2dv. 160111
Rodríguez Martínez, Romy, Gaudi, B. Scott, Rodriguez, Joseph E., Zhou, George, Labadie-Bartz, Jonathan, Quinn, Samuel N., Penev, Kaloyan, Tan, Thiam-Guan, Latham, David W., Paredes, Leonardo A., Kielkopf, John F., Addison, Brett, Wright, Duncan J., Teske, Johanna, Howell, Steve B., Ciardi, David, Ziegler, Carl, Stassun, Keivan G., Johnson, Marshall C., Eastman, Jason D., Siverd, Robert J., Beatty, Thomas G., Bouma, Luke, Bedding, Timothy, Pepper, Joshua et al. 2020. "KELT-25 b and KELT-26 b: A Hot Jupiter and a Substellar Companion Transiting Young A Stars Observed by TESS." The Astronomical Journal 160:111. https://doi.org/10.3847/1538-3881/ab9f2d
ID: 157580
Type: article
Authors: Rodríguez Martínez, Romy; Gaudi, B. Scott; Rodriguez, Joseph E.; Zhou, George; Labadie-Bartz, Jonathan; Quinn, Samuel N.; Penev, Kaloyan; Tan, Thiam-Guan; Latham, David W.; Paredes, Leonardo A.; Kielkopf, John F.; Addison, Brett; Wright, Duncan J.; Teske, Johanna; Howell, Steve B.; Ciardi, David; Ziegler, Carl; Stassun, Keivan G.; Johnson, Marshall C.; Eastman, Jason D.; Siverd, Robert J.; Beatty, Thomas G.; Bouma, Luke; Bedding, Timothy; Pepper, Joshua; Winn, Joshua; Lund, Michael B.; Villanueva, Steven, Jr.; Stevens, Daniel J.; Jensen, Eric L. N.; Kilby, Coleman; Crane, Jeffrey D.; Tokovinin, Andrei; Everett, Mark E.; Tinney, C. G.; Fausnaugh, Michael; Cohen, David H.; Bayliss, Daniel; Bieryla, Allyson; Cargile, Phillip A.; Collins, Karen A.; Conti, Dennis M.; Colón, Knicole D.; Curtis, Ivan A.; DePoy, D. L.; Evans, Phil; Feliz, Dax L.; Gregorio, Joao; Rothenberg, Jason; James, David J.; Joner, Michael D.; Kuhn, Rudolf B.; Manner, Mark; Khakpash, Somayeh; Marshall, Jennifer L.; McLeod, Kim K.; Penny, Matthew T.; Reed, Phillip A.; Relles, Howard M.; Stephens, Denise C.; Stockdale, Chris; Trueblood, Mark; Trueblood, Pat; Yao, Xinyu; Zambelli, Roberto; Vanderspek, Roland; Seager, Sara; Jenkins, Jon M.; Henry, Todd J.; James, Hodari-Sadiki; Jao, Wei-Chun; Wang, Sharon Xuesong; Butler, Paul; Thompson, Ian; Shectman, Stephen; Wittenmyer, Robert; Bowler, Brendan P.; Horner, Jonathan; Kane, Stephen R.; Mengel, Matthew W.; Morton, Timothy D.; Okumura, Jack; Plavchan, Peter; Zhang, Hui; Scott, Nicholas J.; Matson, Rachel A.; Mann, Andrew W.; Dragomir, Diana; Günther, Max; Ting, Eric B.; Glidden, Ana; Quintana, Elisa V.
Abstract: We present the discoveries of KELT-25 b (TIC 65412605, TOI-626.01) and KELT-26 b (TIC 160708862, TOI-1337.01), two transiting companions orbiting relatively bright, early A stars. The transit signals were initially detected by the KELT survey and subsequently confirmed by Transiting Exoplanet Survey Satellite (TESS) photometry. KELT-25 b is on a 4.40 day orbit around the V = 9.66 star CD-24 5016 ( ${T}_{\mathrm{eff}}={8280}_{-180}^{+440}$ K, M = ${2.18}_{-0.11}^{+0.12}$ M), while KELT-26 b is on a 3.34 day orbit around the V = 9.95 star HD 134004 ( ${T}_{\mathrm{eff}}$ = ${8640}_{-240}^{+500}$ K, M = ${1.93}_{-0.16}^{+0.14}$ M), which is likely an Am star. We have confirmed the substellar nature of both companions through detailed characterization of each system using ground-based and TESS photometry, radial velocity measurements, Doppler tomography, and high-resolution imaging. For KELT-25, we determine a companion radius of RP = ${1.64}_{-0.043}^{+0.039}$ RJ and a 3σ upper limit on the companion's mass of ∼64 MJ. For KELT-26 b, we infer a planetary mass and radius of MP = ${1.41}_{-0.51}^{+0.43}$ ${M}_{{\rm{J}}}$ and RP = ${1.94}_{-0.058}^{+0.060}$ RJ. From Doppler tomographic observations, we find KELT-26 b to reside in a highly misaligned orbit. This conclusion is weakly corroborated by a subtle asymmetry in the transit light curve from the TESS data. KELT-25 b appears to be in a well-aligned, prograde orbit, and the system is likely a member of the cluster Theia 449. * This paper includes data gathered with the 6.5 m Magellan Telescopes located at Las Campanas Observatory, Chile.
The First Habitable-zone Earth-sized Planet from TESS. II. Spitzer Confirms TOI-700 dRodriguez, Joseph E.Vanderburg, AndrewZieba, SebastianKreidberg, LauraMorley, Caroline V.Eastman, Jason D.Kane, Stephen R.Spencer, AltonQuinn, Samuel N.Cloutier, RyanHuang, Chelsea X.Collins, Karen A.Mann, Andrew W.Gilbert, EmilySchlieder, Joshua E.Quintana, Elisa V.Barclay, ThomasSuissa, GabrielleKopparapu, Ravi KumarDressing, Courtney D.Ricker, George R.Vanderspek, Roland K.Latham, David W.Seager, SaraWinn, Joshua N.Jenkins, Jon M.Berta-Thompson, ZachoryBoyd, Patricia T.Charbonneau, DavidCaldwell, Douglas A.Chiang, EugeneChristiansen, Jessie L.Ciardi, David R.Colón, Knicole D.Doty, JohnGan, TianjunGuerrero, NataliaGünther, Maximilian N.Lee, Eve J.Levine, Alan M.Lopez, EricMuirhead, Philip S.Newton, ElisabethRose, Mark E.Twicken, Joseph D.Villaseñor, Jesus NoelDOI: info:10.3847/1538-3881/aba4b3v. 160117
Rodriguez, Joseph E., Vanderburg, Andrew, Zieba, Sebastian, Kreidberg, Laura, Morley, Caroline V., Eastman, Jason D., Kane, Stephen R., Spencer, Alton, Quinn, Samuel N., Cloutier, Ryan, Huang, Chelsea X., Collins, Karen A., Mann, Andrew W., Gilbert, Emily, Schlieder, Joshua E., Quintana, Elisa V., Barclay, Thomas, Suissa, Gabrielle, Kopparapu, Ravi Kumar, Dressing, Courtney D., Ricker, George R., Vanderspek, Roland K., Latham, David W., Seager, Sara, Winn, Joshua N. et al. 2020. "The First Habitable-zone Earth-sized Planet from TESS. II. Spitzer Confirms TOI-700 d." The Astronomical Journal 160:117. https://doi.org/10.3847/1538-3881/aba4b3
ID: 157583
Type: article
Authors: Rodriguez, Joseph E.; Vanderburg, Andrew; Zieba, Sebastian; Kreidberg, Laura; Morley, Caroline V.; Eastman, Jason D.; Kane, Stephen R.; Spencer, Alton; Quinn, Samuel N.; Cloutier, Ryan; Huang, Chelsea X.; Collins, Karen A.; Mann, Andrew W.; Gilbert, Emily; Schlieder, Joshua E.; Quintana, Elisa V.; Barclay, Thomas; Suissa, Gabrielle; Kopparapu, Ravi Kumar; Dressing, Courtney D.; Ricker, George R.; Vanderspek, Roland K.; Latham, David W.; Seager, Sara; Winn, Joshua N.; Jenkins, Jon M.; Berta-Thompson, Zachory; Boyd, Patricia T.; Charbonneau, David; Caldwell, Douglas A.; Chiang, Eugene; Christiansen, Jessie L.; Ciardi, David R.; Colón, Knicole D.; Doty, John; Gan, Tianjun; Guerrero, Natalia; Günther, Maximilian N.; Lee, Eve J.; Levine, Alan M.; Lopez, Eric; Muirhead, Philip S.; Newton, Elisabeth; Rose, Mark E.; Twicken, Joseph D.; Villaseñor, Jesus Noel
Abstract: We present Spitzer 4.5 μm observations of the transit of TOI-700 d, a habitable-zone Earth-sized planet in a multiplanet system transiting a nearby M-dwarf star (TIC 150428135, 2MASS J06282325-6534456). TOI-700 d has a radius of ${1.144}_{-0.061}^{+0.062}{R}_{\oplus }$ and orbits within its host star's conservative habitable zone with a period of 37.42 days (Teq ∼ 269 K). TOI-700 also hosts two small inner planets (Rb = ${1.037}_{-0.064}^{+0.065}{R}_{\oplus }$ and Rc = ${2.65}_{-0.15}^{+0.16}{R}_{\oplus }$ ) with periods of 9.98 and 16.05 days, respectively. Our Spitzer observations confirm the Transiting Exoplanet Survey Satellite (TESS) detection of TOI-700 d and remove any remaining doubt that it is a genuine planet. We analyze the Spitzer light curve combined with the 11 sectors of TESS observations and a transit of TOI-700 c from the LCOGT network to determine the full system parameters. Although studying the atmosphere of TOI-700 d is not likely feasible with upcoming facilities, it may be possible to measure the mass of TOI-700 d using state-of-the-art radial velocity (RV) instruments (expected RV semiamplitude of ∼70 cm s-1).
TESS Reveals a Short-period Sub-Neptune Sibling (HD 86226c) to a Known Long-period Giant PlanetTeske, JohannaDíaz, Matías R.Luque, RafaelMočnik, TeoSeidel, Julia V.Otegi, Jon FernándezFeng, FaboJenkins, James S.Pallè, EnricSégransan, DamienUdry, StèphaneCollins, Karen A.Eastman, Jason D.Ricker, George R.Vanderspek, RolandLatham, David W.Seager, SaraWinn, Joshua N.Jenkins, Jon M.Anderson, David R.Barclay, ThomasBouchy, FrançoisBurt, Jennifer A.Butler, R. PaulCaldwell, Douglas A.Collins, Kevin I.Crane, Jeffrey D.Dorn, CarolineFlowers, ErinHaldemann, JonasHelled, RavitHellier, CoelJensen, Eric L. N.Kane, Stephen R.Law, NicholasLissauer, Jack J.Mann, Andrew W.Marmier, MaximeNielsen, Louise DyregaardRose, Mark E.Shectman, Stephen A.Shporer, AviTorres, GuillermoWang, Sharon X.Wolfgang, AngieWong, IanZiegler, CarlDOI: info:10.3847/1538-3881/ab9f95v. 16096
Teske, Johanna, Díaz, Matías R., Luque, Rafael, Močnik, Teo, Seidel, Julia V., Otegi, Jon Fernández, Feng, Fabo, Jenkins, James S., Pallè, Enric, Ségransan, Damien, Udry, Stèphane, Collins, Karen A., Eastman, Jason D., Ricker, George R., Vanderspek, Roland, Latham, David W., Seager, Sara, Winn, Joshua N., Jenkins, Jon M., Anderson, David R., Barclay, Thomas, Bouchy, François, Burt, Jennifer A., Butler, R. Paul, Caldwell, Douglas A. et al. 2020. "TESS Reveals a Short-period Sub-Neptune Sibling (HD 86226c) to a Known Long-period Giant Planet." The Astronomical Journal 160:96. https://doi.org/10.3847/1538-3881/ab9f95
ID: 157770
Type: article
Authors: Teske, Johanna; Díaz, Matías R.; Luque, Rafael; Močnik, Teo; Seidel, Julia V.; Otegi, Jon Fernández; Feng, Fabo; Jenkins, James S.; Pallè, Enric; Ségransan, Damien; Udry, Stèphane; Collins, Karen A.; Eastman, Jason D.; Ricker, George R.; Vanderspek, Roland; Latham, David W.; Seager, Sara; Winn, Joshua N.; Jenkins, Jon M.; Anderson, David R.; Barclay, Thomas; Bouchy, François; Burt, Jennifer A.; Butler, R. Paul; Caldwell, Douglas A.; Collins, Kevin I.; Crane, Jeffrey D.; Dorn, Caroline; Flowers, Erin; Haldemann, Jonas; Helled, Ravit; Hellier, Coel; Jensen, Eric L. N.; Kane, Stephen R.; Law, Nicholas; Lissauer, Jack J.; Mann, Andrew W.; Marmier, Maxime; Nielsen, Louise Dyregaard; Rose, Mark E.; Shectman, Stephen A.; Shporer, Avi; Torres, Guillermo; Wang, Sharon X.; Wolfgang, Angie; Wong, Ian; Ziegler, Carl
Abstract: The Transiting Exoplanet Survey Satellite mission was designed to find transiting planets around bright, nearby stars. Here, we present the detection and mass measurement of a small, short-period (≍4 days) transiting planet around the bright (V = 7.9), solar-type star HD 86226 (TOI-652, TIC 22221375), previously known to host a long-period (∼1600 days) giant planet. HD 86226c (TOI-652.01) has a radius of 2.16 ± 0.08 R and a mass of ${7.25}_{-1.12}^{+1.19}$ M, based on archival and new radial velocity data. We also update the parameters of the longer-period, not-known-to-transit planet, and find it to be less eccentric and less massive than previously reported. The density of the transiting planet is 3.97 g cm-3, which is low enough to suggest that the planet has at least a small volatile envelope, but the mass fractions of rock, iron, and water are not well-constrained. Given the host star brightness, planet period, and location of the planet near both the "radius gap" and the "hot Neptune desert," HD 86226c is an interesting candidate for transmission spectroscopy to further refine its composition. * This paper includes data gathered with the 6.5 m Magellan Telescopes located at Las Campanas Observatory, Chile.
Qatar Exoplanet Survey: Qatar-8b, 9b, and 10b—A Hot Saturn and Two Hot JupitersAlsubai, KhalidTsvetanov, Zlatan I.Pyrzas, StylianosLatham, David W.Bieryla, AllysonEastman, JasonMislis, DimitrisEsquerdo, Gilbert A.Southworth, JohnMancini, LuigiEsamdin, AliLiu, JinzhongMa, LuBretton, MarcPallé, EnricMurgas, FelipeVilchez, Nicolas P. E.Parviainien, HannuMontañes-Rodriguez, PilarNarita, NorioFukui, AkihikoKusakabe, NobuhikoTamura, MotohideBarkaoui, KhalidPozuelos, FranciscoGillon, MichaelJehin, EmmanuelBenkhaldoun, ZouhairDaassou, AhmedDOI: info:10.3847/1538-3881/ab19bcv. 157224
Alsubai, Khalid, Tsvetanov, Zlatan I., Pyrzas, Stylianos, Latham, David W., Bieryla, Allyson, Eastman, Jason, Mislis, Dimitris, Esquerdo, Gilbert A., Southworth, John, Mancini, Luigi, Esamdin, Ali, Liu, Jinzhong, Ma, Lu, Bretton, Marc, Pallé, Enric, Murgas, Felipe, Vilchez, Nicolas P. E., Parviainien, Hannu, Montañes-Rodriguez, Pilar, Narita, Norio, Fukui, Akihiko, Kusakabe, Nobuhiko, Tamura, Motohide, Barkaoui, Khalid, Pozuelos, Francisco et al. 2019. "Qatar Exoplanet Survey: Qatar-8b, 9b, and 10b—A Hot Saturn and Two Hot Jupiters." The Astronomical Journal 157:224. https://doi.org/10.3847/1538-3881/ab19bc
ID: 152879
Type: article
Authors: Alsubai, Khalid; Tsvetanov, Zlatan I.; Pyrzas, Stylianos; Latham, David W.; Bieryla, Allyson; Eastman, Jason; Mislis, Dimitris; Esquerdo, Gilbert A.; Southworth, John; Mancini, Luigi; Esamdin, Ali; Liu, Jinzhong; Ma, Lu; Bretton, Marc; Pallé, Enric; Murgas, Felipe; Vilchez, Nicolas P. E.; Parviainien, Hannu; Montañes-Rodriguez, Pilar; Narita, Norio; Fukui, Akihiko; Kusakabe, Nobuhiko; Tamura, Motohide; Barkaoui, Khalid; Pozuelos, Francisco; Gillon, Michael; Jehin, Emmanuel; Benkhaldoun, Zouhair; Daassou, Ahmed
Abstract: In this paper we present three new extrasolar planets from the Qatar Exoplanet Survey. Qatar-8b is a hot Saturn, with M P = 0.37 M J and R P = 1.3 R J, orbiting a solar-like star every P orb = 3.7 days. Qatar-9b is a hot Jupiter with a mass of M P = 1.2 M J and a radius of R P = 1 R J, in an orbit of P orb = 1.5 days around a low mass, M = 0.7 M , mid-K main-sequence star. Finally, Qatar-10b is a hot, T eq ∼ 2000 K, sub-Jupiter mass planet, M P = 0.7 M J, with a radius of R P = 1.54 R J and an orbital period of P orb = 1.6 days, placing it on the edge of the sub-Jupiter desert.
TESS Delivers Its First Earth-sized Planet and a Warm Sub-NeptuneDragomir, DianaTeske, JohannaGünther, Maximilian N.Ségransan, DamienBurt, Jennifer A.Huang, Chelsea X.Vanderburg, AndrewMatthews, ElisabethDumusque, XavierStassun, Keivan G.Pepper, JoshuaRicker, George R.Vanderspek, RolandLatham, David W.Seager, SaraWinn, Joshua N.Jenkins, Jon M.Beatty, ThomasBouchy, FrançoisBrown, Timothy M.Butler, R. PaulCiardi, David R.Crane, Jeffrey D.Eastman, Jason D.Fossati, LucaFrancis, JimFulton, Benjamin J.Gaudi, B. ScottGoeke, Robert F.James, DavidKlaus, Todd C.Kuhn, Rudolf B.Lovis, ChristopheLund, Michael B.McDermott, ScottPaegert, MartinPepe, FrancescoRodriguez, Joseph E.Sha, LizhouShectman, Stephen A.Shporer, AviSiverd, Robert J.Garcia Soto, AylinStevens, Daniel J.Twicken, Joseph D.Udry, StéphaneVillanueva, Steven, Jr.Wang, Sharon X.Wohler, BillYao, XinyuZhan, ZhuchangDOI: info:10.3847/2041-8213/ab12edv. 875L7
Dragomir, Diana, Teske, Johanna, Günther, Maximilian N., Ségransan, Damien, Burt, Jennifer A., Huang, Chelsea X., Vanderburg, Andrew, Matthews, Elisabeth, Dumusque, Xavier, Stassun, Keivan G., Pepper, Joshua, Ricker, George R., Vanderspek, Roland, Latham, David W., Seager, Sara, Winn, Joshua N., Jenkins, Jon M., Beatty, Thomas, Bouchy, François, Brown, Timothy M., Butler, R. Paul, Ciardi, David R., Crane, Jeffrey D., Eastman, Jason D., Fossati, Luca et al. 2019. "TESS Delivers Its First Earth-sized Planet and a Warm Sub-Neptune." The Astrophysical Journal 875:L7. https://doi.org/10.3847/2041-8213/ab12ed
ID: 155321
Type: article
Authors: Dragomir, Diana; Teske, Johanna; Günther, Maximilian N.; Ségransan, Damien; Burt, Jennifer A.; Huang, Chelsea X.; Vanderburg, Andrew; Matthews, Elisabeth; Dumusque, Xavier; Stassun, Keivan G.; Pepper, Joshua; Ricker, George R.; Vanderspek, Roland; Latham, David W.; Seager, Sara; Winn, Joshua N.; Jenkins, Jon M.; Beatty, Thomas; Bouchy, François; Brown, Timothy M.; Butler, R. Paul; Ciardi, David R.; Crane, Jeffrey D.; Eastman, Jason D.; Fossati, Luca; Francis, Jim; Fulton, Benjamin J.; Gaudi, B. Scott; Goeke, Robert F.; James, David; Klaus, Todd C.; Kuhn, Rudolf B.; Lovis, Christophe; Lund, Michael B.; McDermott, Scott; Paegert, Martin; Pepe, Francesco; Rodriguez, Joseph E.; Sha, Lizhou; Shectman, Stephen A.; Shporer, Avi; Siverd, Robert J.; Garcia Soto, Aylin; Stevens, Daniel J.; Twicken, Joseph D.; Udry, Stéphane; Villanueva, Steven, Jr.; Wang, Sharon X.; Wohler, Bill; Yao, Xinyu; Zhan, Zhuchang
Abstract: The future of exoplanet science is bright, as Transiting Exoplanet Survey Satellite (TESS) once again demonstrates with the discovery of its longest-period confirmed planet to date. We hereby present HD 21749b (TOI 186.01), a sub-Neptune in a 36 day orbit around a bright (V = 8.1) nearby (16 pc) K4.5 dwarf. TESS measures HD 21749b to be {2.61}-0.16+0.17 R , and combined archival and follow-up precision radial velocity data put the mass of the planet at {22.7}-1.9+2.2 M . HD 21749b contributes to the TESS Level 1 Science Requirement of providing 50 transiting planets smaller than 4 R with measured masses. Furthermore, we report the discovery of HD 21749c (TOI 186.02), the first Earth-sized ({R}p={0.892}-0.058+0.064{R}\oplus ) planet from TESS. The HD 21749 system is a prime target for comparative studies of planetary composition and architecture in multi- planet systems. This Letter includes data gathered with the 6.5 m Magellan Telescopes located at Las Campanas Observatory, Chile.
Hot, rocky and warm, puffy super-Earths orbiting TOI-402 (HD 15337)Dumusque, XavierTurner, OliverDorn, CarolineEastman, Jason D.Allart, RomainAdibekyan, VardanSousa, SergioSantos, Nuno C.Mordasini, ChristophBourrier, VincentBouchy, FrançoisCoffinet, AdrienDavies, Misty D.Díaz, Rodrigo F.Fausnaugh, Michael M.Glidden, AnaGuerrero, NataliaHenze, Christopher E.Jenkins, Jon M.Latham, David W.Lovis, CristopheMayor, MichelPepe, FrancescoQuintana, Elisa V.Ricker, George R.Rowden, PamelaSegransan, DamienMascareño, Alejandro SuárezSeager, SaraTwicken, Joseph D.Udry, StéphaneVanderspek, Roland K.Winn, Joshua N.DOI: info:10.1051/0004-6361/201935457v. 627A43
Dumusque, Xavier, Turner, Oliver, Dorn, Caroline, Eastman, Jason D., Allart, Romain, Adibekyan, Vardan, Sousa, Sergio, Santos, Nuno C., Mordasini, Christoph, Bourrier, Vincent, Bouchy, François, Coffinet, Adrien, Davies, Misty D., Díaz, Rodrigo F., Fausnaugh, Michael M., Glidden, Ana, Guerrero, Natalia, Henze, Christopher E., Jenkins, Jon M., Latham, David W., Lovis, Cristophe, Mayor, Michel, Pepe, Francesco, Quintana, Elisa V., Ricker, George R. et al. 2019. "Hot, rocky and warm, puffy super-Earths orbiting TOI-402 (HD 15337)." Astronomy and Astrophysics 627:A43. https://doi.org/10.1051/0004-6361/201935457
ID: 154176
Type: article
Authors: Dumusque, Xavier; Turner, Oliver; Dorn, Caroline; Eastman, Jason D.; Allart, Romain; Adibekyan, Vardan; Sousa, Sergio; Santos, Nuno C.; Mordasini, Christoph; Bourrier, Vincent; Bouchy, François; Coffinet, Adrien; Davies, Misty D.; Díaz, Rodrigo F.; Fausnaugh, Michael M.; Glidden, Ana; Guerrero, Natalia; Henze, Christopher E.; Jenkins, Jon M.; Latham, David W.; Lovis, Cristophe; Mayor, Michel; Pepe, Francesco; Quintana, Elisa V.; Ricker, George R.; Rowden, Pamela; Segransan, Damien; Mascareño, Alejandro Suárez; Seager, Sara; Twicken, Joseph D.; Udry, Stéphane; Vanderspek, Roland K.; Winn, Joshua N.
Abstract: Context. The Transiting Exoplanet Survey Satellite (TESS) is revolutionising the search for planets orbiting bright and nearby stars. In sectors 3 and 4, TESS observed TOI-402 (TIC-120896927), a bright V = 9.1 K1 dwarf also known as HD 15337, and found two transiting signals with periods of 4.76 and 17.18 days and radii of 1.90 and 2.21 R, respectively. This star was observed prior to the TESS detection as part of the radial-velocity (RV) search for planets using the HARPS spectrometer, and 85 precise RV measurements were obtained before the launch of TESS over a period of 14 yr. Aims: In this paper, we analyse the HARPS RV measurements in hand to confirm the planetary nature of these two signals. Methods: HD 15337 happens to present a stellar activity level similar to the Sun, with a magnetic cycle of similar amplitude and RV measurements that are affected by stellar activity. By modelling this stellar activity in the HARPS radial velocities using a linear dependence with the calcium activity index log(RHK'), we are able, with a periodogram approach, to confirm the periods and the planetary nature of TOI-402.01 and TOI-402.02. We then derive robust estimates from the HARPS RVs for the orbital parameters of these two planets by modelling stellar activity with a Gaussian process and using the marginalised posterior probability density functions obtained from our analysis of TESS photometry for the orbital period and time of transit. Results: By modelling TESS photometry and the stellar host characteristics, we find that TOI-402.01 and TOI-402.02 have periods of 4.75642 ± 0.00021 and 17.1784 ± 0.0016 days and radii of 1.70 ± 0.06 and 2.52 ± 0.11 R (precision 3.6 and 4.2%), respectively. By analysing the HARPS RV measurements, we find that those planets are both super-Earths with masses of 7.20 ± 0.81 and 8.79 ± 1.68 M (precision 11.3 and 19.1%), and small eccentricities compatible with zero at 2σ. Conclusions: Although having rather similar masses, the radii of these two planets are very different, putting them on different sides of the radius gap. By studying the temporal evolution under X-ray and UV (XUV) driven atmospheric escape of the TOI-402 planetary system, we confirm, under the given assumptions, that photo-evaporation is a plausible explanation for this radius difference. Those two planets, being in the same system and therefore being in the same irradiation environment are therefore extremely useful for comparative exoplanetology across the evaporation valley and thus bring constraints on the mechanisms responsible for the radius gap. Table A.1 is only available at the CDS via anonymous ftp to http://cdsarc.u-strasbg.fr (ftp://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz- bin/qcat?J/A+A/627/A43Based on observations made with the HARPS instrument on the ESO 3.6 m telescope at La Silla Observatory under the GTO program 072.C-0488(E) and Large programs 183.C-0972(A), 192.C-0852(A), 196.C-1006 and 198.C-0836(A).
KELT-23Ab: A Hot Jupiter Transiting a Near-solar Twin Close to the TESS and JWST Continuous Viewing ZonesJohns, DanielReed, Phillip A.Rodriguez, Joseph E.Pepper, JoshuaStassun, Keivan G.Penev, KaloyanGaudi, B. ScottLabadie-Bartz, JonathanFulton, Benjamin J.Quinn, Samuel N.Eastman, Jason D.Ciardi, David R.Hirsch, LeaStevens, Daniel J.Stevens, Catherine P.Oberst, Thomas E.Cohen, David H.Jensen, Eric L. N.Benni, PaulVillanueva, Steven, Jr.Murawski, GabrielBieryla, AllysonLatham, David W.Vanaverbeke, SiegfriedDubois, FrankyRau, SteveLogie, LudwigRauenzahn, Ryan F.Wittenmyer, Robert A.Zambelli, RobertoBayliss, DanielBeatty, Thomas G.Collins, Karen A.Colón, Knicole D.Curtis, Ivan A.Evans, PhilGregorio, JoaoJames, DavidDePoy, D. L.Johnson, Marshall C.Joner, Michael D.Kasper, David H.Khakpash, SomayehKielkopf, John F.Kuhn, Rudolf B.Lund, Michael B.Manner, MarkMarshall, Jennifer L.McLeod, Kim K.Penny, Matthew T.Relles, HowardSiverd, Robert J.Stephens, Denise C.Stockdale, ChrisTan, Thiam-GuanTrueblood, MarkTrueblood, PatYao, XinyuDOI: info:10.3847/1538-3881/ab24c7v. 15878
Johns, Daniel, Reed, Phillip A., Rodriguez, Joseph E., Pepper, Joshua, Stassun, Keivan G., Penev, Kaloyan, Gaudi, B. Scott, Labadie-Bartz, Jonathan, Fulton, Benjamin J., Quinn, Samuel N., Eastman, Jason D., Ciardi, David R., Hirsch, Lea, Stevens, Daniel J., Stevens, Catherine P., Oberst, Thomas E., Cohen, David H., Jensen, Eric L. N., Benni, Paul, Villanueva, Steven, Jr., Murawski, Gabriel, Bieryla, Allyson, Latham, David W., Vanaverbeke, Siegfried, Dubois, Franky et al. 2019. "KELT-23Ab: A Hot Jupiter Transiting a Near-solar Twin Close to the TESS and JWST Continuous Viewing Zones." The Astronomical Journal 158:78. https://doi.org/10.3847/1538-3881/ab24c7
ID: 154278
Type: article
Authors: Johns, Daniel; Reed, Phillip A.; Rodriguez, Joseph E.; Pepper, Joshua; Stassun, Keivan G.; Penev, Kaloyan; Gaudi, B. Scott; Labadie-Bartz, Jonathan; Fulton, Benjamin J.; Quinn, Samuel N.; Eastman, Jason D.; Ciardi, David R.; Hirsch, Lea; Stevens, Daniel J.; Stevens, Catherine P.; Oberst, Thomas E.; Cohen, David H.; Jensen, Eric L. N.; Benni, Paul; Villanueva, Steven, Jr.; Murawski, Gabriel; Bieryla, Allyson; Latham, David W.; Vanaverbeke, Siegfried; Dubois, Franky; Rau, Steve; Logie, Ludwig; Rauenzahn, Ryan F.; Wittenmyer, Robert A.; Zambelli, Roberto; Bayliss, Daniel; Beatty, Thomas G.; Collins, Karen A.; Colón, Knicole D.; Curtis, Ivan A.; Evans, Phil; Gregorio, Joao; James, David; DePoy, D. L.; Johnson, Marshall C.; Joner, Michael D.; Kasper, David H.; Khakpash, Somayeh; Kielkopf, John F.; Kuhn, Rudolf B.; Lund, Michael B.; Manner, Mark; Marshall, Jennifer L.; McLeod, Kim K.; Penny, Matthew T.; Relles, Howard; Siverd, Robert J.; Stephens, Denise C.; Stockdale, Chris; Tan, Thiam-Guan; Trueblood, Mark; Trueblood, Pat; Yao, Xinyu
Abstract: We announce the discovery of KELT-23Ab, a hot Jupiter transiting the relatively bright (V = 10.3) star BD+66 911 (TYC 4187-996-1), and characterize the system using follow-up photometry and spectroscopy. A global fit to the system yields host-star properties of {T}eff} =5900+/- 49 K, {M}* ={0.945}-0.054+0.060 {M}, {R}* =0.995+/- 0.015 {R}, {L}* ={1.082}-0.048+0.051 {L}, {log}{g}\star ={4.418}-0.025+0.026 (cgs), and ≤ft[{Fe}/{{H}}\right]=-0.105+/- 0.077. KELT-23Ab is a hot Jupiter with a mass of {M}P={0.938}-0.042+0.045 {M}{{J}}, radius of {R}P=1.322+/- 0.025 {R}{{J}}, and density of {ρ }P={0.504}-0.035+0.038 g cm-3. Intense insolation flux from the star has likely caused KELT-23Ab to become inflated. The time of inferior conjunction is {T}0=2458149.40776+/- 0.00091 {BJD}}TDB} and the orbital period is P={2.255353}-0.000030+0.000031 days. There is strong evidence that KELT-23A is a member of a long-period binary star system with a less luminous companion, and due to tidal interactions, the planet is likely to spiral into its host within roughly a gigayear. This system has one of the highest positive ecliptic latitudes of all transiting planet hosts known to date, placing it near the Transiting Planet Survey Satellite and James Webb Space Telescope continuous viewing zones. Thus we expect it to be an excellent candidate for long-term monitoring and follow up with these facilities.
KELT-22Ab: A Massive, Short-Period Hot Jupiter Transiting a Near-solar TwinLabadie-Bartz, JonathanRodriguez, Joseph E.Stassun, Keivan G.Ciardi, David R.Penev, KaloyanJohnson, Marshall C.Gaudi, B. ScottColón, Knicole D.Bieryla, AllysonLatham, David W.Pepper, JoshuaCollins, Karen A.Evans, PhilRelles, HowardSiverd, Robert J.Bento, JoaoYao, XinyuStockdale, ChrisTan, Thiam-GuanZhou, GeorgeEastman, Jason D.Albrow, Michael D.Bayliss, DanielBeatty, Thomas G.Berlind, PerryBozza, ValerioCalkins, Michael L.Cohen, David H.Curtis, Ivan A.Esquerdo, Gilbert A.Feliz, DaxFulton, Benjamin J.Gregorio, JoaoJames, DavidJensen, Eric L. N.Johnson, John AsherJohnson, Samson A.Joner, Michael D.Kasper, DavidKielkopf, John F.Kuhn, Rudolf B.Lund, Michael B.Malpas, AmberManner, MarkMcCrady, NateMcLeod, Kim K.Oberst, Thomas E.Penny, Matthew T.Reed, Phillip A.Sliski, David H.Stephens, Denise C.Stevens, Daniel J.Villanueva, Steven, Jr.Wittenmyer, Robert A.Wright, J. T.Zambelli, RobertoDOI: info:10.3847/1538-4365/aaee7ev. 24013
Labadie-Bartz, Jonathan, Rodriguez, Joseph E., Stassun, Keivan G., Ciardi, David R., Penev, Kaloyan, Johnson, Marshall C., Gaudi, B. Scott, Colón, Knicole D., Bieryla, Allyson, Latham, David W., Pepper, Joshua, Collins, Karen A., Evans, Phil, Relles, Howard, Siverd, Robert J., Bento, Joao, Yao, Xinyu, Stockdale, Chris, Tan, Thiam-Guan, Zhou, George, Eastman, Jason D., Albrow, Michael D., Bayliss, Daniel, Beatty, Thomas G., Berlind, Perry et al. 2019. "KELT-22Ab: A Massive, Short-Period Hot Jupiter Transiting a Near-solar Twin." The Astrophysical Journal Supplement Series 240:13. https://doi.org/10.3847/1538-4365/aaee7e
ID: 150442
Type: article
Authors: Labadie-Bartz, Jonathan; Rodriguez, Joseph E.; Stassun, Keivan G.; Ciardi, David R.; Penev, Kaloyan; Johnson, Marshall C.; Gaudi, B. Scott; Colón, Knicole D.; Bieryla, Allyson; Latham, David W.; Pepper, Joshua; Collins, Karen A.; Evans, Phil; Relles, Howard; Siverd, Robert J.; Bento, Joao; Yao, Xinyu; Stockdale, Chris; Tan, Thiam-Guan; Zhou, George; Eastman, Jason D.; Albrow, Michael D.; Bayliss, Daniel; Beatty, Thomas G.; Berlind, Perry; Bozza, Valerio; Calkins, Michael L.; Cohen, David H.; Curtis, Ivan A.; Esquerdo, Gilbert A.; Feliz, Dax; Fulton, Benjamin J.; Gregorio, Joao; James, David; Jensen, Eric L. N.; Johnson, John Asher; Johnson, Samson A.; Joner, Michael D.; Kasper, David; Kielkopf, John F.; Kuhn, Rudolf B.; Lund, Michael B.; Malpas, Amber; Manner, Mark; McCrady, Nate; McLeod, Kim K.; Oberst, Thomas E.; Penny, Matthew T.; Reed, Phillip A.; Sliski, David H.; Stephens, Denise C.; Stevens, Daniel J.; Villanueva, Steven, Jr.; Wittenmyer, Robert A.; Wright, J. T.; Zambelli, Roberto
Abstract: We present the discovery of KELT-22Ab, a hot Jupiter from the KELT-South survey. KELT-22Ab transits the moderately bright (V ∼ 11.1) Sun-like G2V star TYC 7518-468-1. The planet has an orbital period of P =1.3866529+/- 0.0000027 days, a radius of {R}P={1.285}-0.071+0.12 {R}J, and a relatively large mass of {M}P={3.47}-0.14+0.15 {M}J. The star has {R}\star ={1.099}-0.046+0.079 {R}ȯ , {M}\star ={1.092}-0.041+0.045 {M}ȯ , {T}eff} ={5767}-49+50 K, {log}{g}\star ={4.393}-0.060+0.039 (cgs), and [m/H] = +{0.259}-0.083+0.085; thus other than its slightly super-solar metallicity, it appears to be a near-solar twin. Surprisingly, KELT-22A exhibits kinematics and a Galactic orbit that are somewhat atypical for thin-disk stars. Nevertheless, the star is rotating rapidly for its estimated age, and shows evidence of chromospheric activity. Imaging reveals a slightly fainter companion to KELT-22A that is likely bound, with a projected separation of 6″ (∼1400 au). In addition to the orbital motion caused by the transiting planet, we detect a possible linear trend in the radial velocity of KELT-22A, suggesting the presence of another relatively nearby body that is perhaps non-stellar. KELT-22Ab is highly irradiated (as a consequence of the small semimajor axis of a/{R}\star =4.97), and is mildly inflated. At such small separations, tidal forces become significant. The configuration of this system is optimal for measuring the rate of tidal dissipation within the host star. Our models predict that, due to tidal forces, the semimajor axis is decreasing rapidly, and KELT-22Ab is predicted to spiral into the star within the next Gyr.
Near-resonance in a System of Sub-Neptunes from TESSQuinn, Samuel N.Becker, Juliette C.Rodriguez, Joseph E.Hadden, SamHuang, Chelsea X.Morton, Timothy D.Adams, Fred C.Armstrong, DavidEastman, Jason D.Horner, JonathanKane, Stephen R.Lissauer, Jack J.Twicken, Joseph D.Vanderburg, AndrewWittenmyer, RobRicker, George R.Vanderspek, Roland K.Latham, David W.Seager, SaraWinn, Joshua N.Jenkins, Jon M.Agol, EricBarkaoui, KhalidBeichman, Charles A.Bouchy, FrançoisBouma, L. G.Burdanov, ArtemCampbell, JenniferCarlino, RobertoCartwright, Scott M.Charbonneau, DavidChristiansen, Jessie L.Ciardi, DavidCollins, Karen A.Collins, Kevin I.Conti, Dennis M.Crossfield, Ian J. M.Daylan, TansuDittmann, JasonDoty, JohnDragomir, DianaDucrot, ElsaGillon, MichaelGlidden, AnaGoeke, Robert F.Gonzales, Erica J.Hełminiak, Krzysztof G.Horch, Elliott P.Howell, Steve B.Jehin, EmmanuelJensen, Eric L. N.Kielkopf, John F.Kristiansen, Martti H.Law, NicholasMann, Andrew W.Marmier, MaximeMatson, Rachel A.Matthews, ElisabethMazeh, TseviMori, MayukoMurgas, FelipeMurray, CatrionaNarita, NorioNielsen, Louise D.Ottoni, GaëlPalle, EnricPawłaszek, RafałPepe, FrancescoPitogo de Leon, JeromePozuelos, Francisco J.Relles, Howard M.Schlieder, Joshua E.Sebastian, DanielSégransan, DamienShporer, AviStassun, Keivan G.Tamura, MotohideUdry, StéphaneWaite, IanWinters, Jennifer G.Ziegler, CarlDOI: info:10.3847/1538-3881/ab3f2bv. 158177
Quinn, Samuel N., Becker, Juliette C., Rodriguez, Joseph E., Hadden, Sam, Huang, Chelsea X., Morton, Timothy D., Adams, Fred C., Armstrong, David, Eastman, Jason D., Horner, Jonathan, Kane, Stephen R., Lissauer, Jack J., Twicken, Joseph D., Vanderburg, Andrew, Wittenmyer, Rob, Ricker, George R., Vanderspek, Roland K., Latham, David W., Seager, Sara, Winn, Joshua N., Jenkins, Jon M., Agol, Eric, Barkaoui, Khalid, Beichman, Charles A., Bouchy, François et al. 2019. "Near-resonance in a System of Sub-Neptunes from TESS." The Astronomical Journal 158:177. https://doi.org/10.3847/1538-3881/ab3f2b
ID: 154591
Type: article
Authors: Quinn, Samuel N.; Becker, Juliette C.; Rodriguez, Joseph E.; Hadden, Sam; Huang, Chelsea X.; Morton, Timothy D.; Adams, Fred C.; Armstrong, David; Eastman, Jason D.; Horner, Jonathan; Kane, Stephen R.; Lissauer, Jack J.; Twicken, Joseph D.; Vanderburg, Andrew; Wittenmyer, Rob; Ricker, George R.; Vanderspek, Roland K.; Latham, David W.; Seager, Sara; Winn, Joshua N.; Jenkins, Jon M.; Agol, Eric; Barkaoui, Khalid; Beichman, Charles A.; Bouchy, François; Bouma, L. G.; Burdanov, Artem; Campbell, Jennifer; Carlino, Roberto; Cartwright, Scott M.; Charbonneau, David; Christiansen, Jessie L.; Ciardi, David; Collins, Karen A.; Collins, Kevin I.; Conti, Dennis M.; Crossfield, Ian J. M.; Daylan, Tansu; Dittmann, Jason; Doty, John; Dragomir, Diana; Ducrot, Elsa; Gillon, Michael; Glidden, Ana; Goeke, Robert F.; Gonzales, Erica J.; Hełminiak, Krzysztof G.; Horch, Elliott P.; Howell, Steve B.; Jehin, Emmanuel; Jensen, Eric L. N.; Kielkopf, John F.; Kristiansen, Martti H.; Law, Nicholas; Mann, Andrew W.; Marmier, Maxime; Matson, Rachel A.; Matthews, Elisabeth; Mazeh, Tsevi; Mori, Mayuko; Murgas, Felipe; Murray, Catriona; Narita, Norio; Nielsen, Louise D.; Ottoni, Gaël; Palle, Enric; Pawłaszek, Rafał; Pepe, Francesco; Pitogo de Leon, Jerome; Pozuelos, Francisco J.; Relles, Howard M.; Schlieder, Joshua E.; Sebastian, Daniel; Ségransan, Damien; Shporer, Avi; Stassun, Keivan G.; Tamura, Motohide; Udry, Stéphane; Waite, Ian; Winters, Jennifer G.; Ziegler, Carl
Abstract: We report the Transiting Exoplanet Survey Satellite detection of a multi-planet system orbiting the V = 10.9 K0 dwarf TOI-125. We find evidence for up to five planets, with varying confidence. Three transit signals with high signal-to-noise ratio correspond to sub-Neptune-sized planets (2.76, 2.79, and 2.94 R ), and we statistically validate the planetary nature of the two inner planets (P b = 4.65 days, P c = 9.15 days). With only two transits observed, we report the outer object (P .03 = 19.98 days) as a planet candidate with high signal-to-noise ratio. We also detect a candidate transiting super-Earth (1.4 R ) with an orbital period of only 12.7 hr and a candidate Neptune-sized planet (4.2 R ) with a period of 13.28 days, both at low signal-to-noise ratio. This system is amenable to mass determination via radial velocities and transit-timing variations, and provides an opportunity to study planets of similar size while controlling for age and environment. The ratio of orbital periods between TOI-125 b and c (P c /P b = 1.97) is slightly lower than an exact 2:1 commensurability and is atypical of multiple planet systems from Kepler, which show a preference for period ratios just wide of first-order period ratios. A dynamical analysis refines the allowed parameter space through stability arguments and suggests that despite the nearly commensurate periods, the system is unlikely to be in resonance.