Bibcode
Gallart, Carme; Meschin, Ingrid; Aparicio, Antonio; Stetson, Peter B.; Hidalgo, Sebastián L.
Bibliographical reference
The Magellanic System: Stars, Gas, and Galaxies, Proceedings of the International Astronomical Union, IAU Symposium, Volume 256, p. 281-286
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3
2009
Citations
2
Refereed citations
1
Description
Based on the quantitative analysis of a set of wide-field
color—magnitude diagrams reaching the old main sequence-turnoffs,
we present new LMC star-formation histories, and their variation with
galactocentric distance. Some coherent features are found, together with
systematic variations of the star-formation history among the three
fields analyzed. We find two main episodes of star formation in all
three fields, from 1 to 4 and 7 to 13 Gyr ago, with relatively low star
formation around ≃ 4-7 Gyr ago. The youngest age in each field
gradually increases with galactocentric radius; in the innermost field,
LMC 0514-6503, an additional star formation event younger than 1 Gyr is
detected, with star formation declining, however, in the last ≃ 200
Myr. The population is found to be older on average toward the outer
part of the galaxy, although star formation in all fields seems to have
started around 13 Gyr ago.