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

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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.

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Strantzalis, A., Hatzidimitriou, D., Zezas, A., Antoniou, V., Lianou, S., & Tsilia, S. (2019). Discrete star formation events in the central bar of the Small Magellanic Cloud. Monthly Notices of the Royal Astronomical Society, 489(4), 5087–5097. https://doi.org/10.1093/mnras/stz2540

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