Discrete star formation events in the central bar of the Small Magellanic Cloud

Discrete star formation events in the central bar of the Small Magellanic CloudStrantzalis, A.Hatzidimitriou, D.Zezas, A.Antoniou, ValliaLianou, S.Tsilia, S.DOI: info:10.1093/mnras/stz2540v. 4895087–5097
Strantzalis, A., Hatzidimitriou, D., Zezas, A., Antoniou, Vallia, Lianou, S., and Tsilia, S. 2019. "Discrete star formation events in the central bar of the Small Magellanic Cloud." Monthly Notices of the Royal Astronomical Society 489:5087– 5097. https://doi.org/10.1093/mnras/stz2540
ID: 154599
Type: article
Authors: Strantzalis, A.; Hatzidimitriou, D.; Zezas, A.; Antoniou, Vallia; Lianou, S.; Tsilia, S.
Abstract: We present the results of the photometric analysis of a large part of the main body of the Small Magellanic Cloud. Using the 6.5m Magellan Telescope at the Las Campanas Observatory in Chile, we have acquired deep B and I images in four fields (0.44 deg each in diameter), yielding accurate photometry for 1068 893 stars down to 24th magnitude, with a spatial resolution of 0.20 arcsec per pixel. Colour-magnitude diagrams and (completeness-corrected) luminosity functions have been constructed, yielding significant new results that indicate at least two discrete star formation events over a period from 2.7 to 4 Gyr ago. Also, we have derived star formation rates as a function of look-back time and have found enhancements of SF between 4 and 6 Gyr and at younger ages.