Two New HATNet Hot Jupiters around A Stars and the First Glimpse at the Occurrence Rate of Hot Jupiters from TESS

ID: 154718
Type: article
Authors: Zhou, George; Huang, C. X.; Bakos, G. Á.; Hartman, J. D.; Latham, David W.; Quinn, Samuel N.; Collins, Karen A.; Winn, J. N.; Wong, I.; Kovács, G.; Csubry, Z.; Bhatti, W.; Penev, K.; Bieryla, Allyson; Esquerdo, Gilbert A.; Berlind, Perry; Calkins, Michael L.; de Val-Borro, M.; Noyes, R. W.; Lázár, J.; Papp, I.; Sári, P.; Kovács, T.; Buchhave, Lars A.; Szklenar, T.; Béky, B.; Johnson, M. C.; Cochran, W. D.; Kniazev, A. Y.; Stassun, K. G.; Fulton, B. J.; Shporer, A.; Espinoza, N.; Bayliss, D.; Everett, M.; Howell, S. B.; Hellier, C.; Anderson, D. R.; Collier Cameron, A.; West, R. G.; Brown, D. J. A.; Schanche, N.; Barkaoui, K.; Pozuelos, F.; Gillon, M.; Jehin, E.; Benkhaldoun, Z.; Daassou, A.; Ricker, G.; Vanderspek, R.; Seager, S.; Jenkins, J. M.; Lissauer, Jack J.; Armstrong, J. D.; Collins, K. I.; Gan, T.; Hart, R.; Horne, K.; Kielkopf, J. F.; Nielsen, L. D.; Nishiumi, T.; Narita, N.; Palle, E.; Relles, Howard M.; Sefako, R.; Tan, T. G.; Davies, M.; Goeke, Robert F.; Guerrero, N.; Haworth, K.; Villanueva, S.
Abstract: Wide-field surveys for transiting planets are well suited to searching diverse stellar populations, enabling a better understanding of the link between the properties of planets and their parent stars. We report the discovery of HAT-P-69 b (TOI 625.01) and HAT-P-70 b (TOI 624.01), two new hot Jupiters around A stars from the Hungarian-made Automated Telescope Network (HATNet) survey that have also been observed by the Transiting Exoplanet Survey Satellite. HAT-P-69 b has a mass of {3.58}_-0.58^+0.58 M _Jup and a radius of {1.676}_-0.033^+0.051 R _Jup and resides in a prograde 4.79 day orbit. HAT-P-70 b has a radius of {1.87}_-0.10^+0.15 R _Jup and a mass constraint of and a mass constraint of _Jup and resides in a retrograde 2.74 day orbit. We use the confirmation of these planets around relatively massive stars as an opportunity to explore the occurrence rate of hot Jupiters as a function of stellar mass. We define a sample of 47,126 main-sequence stars brighter than T _mag = 10 that yields 31 giant planet candidates, including 18 confirmed planets, 3 candidates, and 10 false positives. We find a net hot Jupiter occurrence rate of 0.41 ± 0.10% within this sample, consistent with the rate measured by Kepler for FGK stars. When divided into stellar mass bins, we find the occurrence rate to be 0.71 ± 0.31% for G stars, 0.43 ± 0.15% for F stars, and 0.26 ± 0.11% for A stars. Thus, at this point, we cannot discern any statistically significant trend in the occurrence of hot Jupiters with stellar mass. Based on observations obtained with the Hungarian-made Automated Telescope Network. Based in part on observations obtained with the Tillinghast Reflector 1.5 m telescope and the 1.2 m telescope, both operated by the Smithsonian Astrophysical Observatory at the Fred Lawrence Whipple Observatory in Arizona. This work makes use of the Smithsonian Institution High Performance Cluster (SI/HPC). Based in part on observations made with the Southern African Large Telescope (SALT).