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Evidence for discrete star formation events in the Small Magellanic Cloud based on 6.5m Magellan Telescope observations

Published online by Cambridge University Press:  30 October 2019

A. Strantzalis ,
D. Hatzidimitriou ,
A. Zezas  and
V. Antoniou
A. Strantzalis
Affiliation:
Department of Physics, National and Kapodistrian University of Athens, Panepistimioupolis email: [email protected]
D. Hatzidimitriou
Affiliation:
Department of Physics, National and Kapodistrian University of Athens, Panepistimioupolis email: [email protected] IAASARS, National Observatory of Athens, Vas Pavlou and I. Metaxa, 15236 Penteli, Greece
A. Zezas
Affiliation:
University of Crete, Physics Department & Institute of Theoretical & Computational Physics, 71003 Heraklion, Crete, Greece Foundation for Research and Technology-Hellas, 71110 Heraklion, Crete, Greece Harvard-Smithosian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA
V. Antoniou
Affiliation:
Harvard-Smithosian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA
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Abstract

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The Small Magellanic Cloud (SMC) presents us with a unique opportunity to study in detail the effect of environmental processes (interaction with the LMC and the Milky Way) on its star formation history. With the 6.5m Magellan Telescope at the Las Campanas Observatory in Chile we have acquired deep B and I images in four 0.44 degree fields covering a large part of the main body of the SMC, yielding accurate photometry for 1,068,893 stars down to ~24th magnitude, with a spatial resolution of 0.201 arcsec/pixel. Colour-magnitude diagrams and luminosity functions (corrected for completeness) have been constructed, yielding significant new results that indicate at least two discrete star formation events around 2.7 and 4-5 Gyr ago.

Keywords

Small Magellanic CloudStar formation eventsMultiple populations
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S344: Dwarf Galaxies: From the Deep Universe to the Present , August 2018 , pp. 143 - 146
Copyright
© International Astronomical Union 2019 

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