The Star Formation History of the Local Group Dwarf Galaxy Leo I

Details The Star Formation History of the Local Group Dwarf Galaxy Leo I The Star Formation History of the Local Group Dwarf Galaxy Leo I

May 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aas...192.7701g&link_type=abstract

American Astronomical Society, 192nd AAS Meeting, #77.01; Bulletin of the American Astronomical Society, Vol. 30, p.931

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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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