The star formation history of Leo I

Details The star formation history of Leo I The star formation history of Leo I

Dec 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998mcdg.proc..147g&link_type=abstract

The Magellanic Clouds and Other Dwarf Galaxies, Proceedings of the Bonn/Bochum-Graduiertenkolleg Workshop, held at the Physikzen

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Colour-Magnitude Diagrams, Star Formation History

Scientific paper

We present results on the star formation history of the Local Group dSph galaxy Leo I, obtained through the analysis of its deep HST color-magnitude diagram (CMD) using model CMDs computed from stellar evolutionary models. Our results show unambiguously that Leo I experienced a major increase of its star formation rate from about 6 Gyr ago to 2 Gyr ago. Some prior star formation possibly ocurred in another discrete episode of enhanced activity lasting 2-3 Gyr. Finally, a low level of star formation continued until 500-200 Myr ago.

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