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

Bibcode
1998AAS...192.7701G
Gallart, Carme; Freedman, Wendy; Aparicio, Antonio; Bertelli, Giampaolo; Chiosi, Cesare
Bibliographical reference

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

Advertised on:
5
1998
Number of authors
5
IAC number of authors
1
Citations
0
Refereed citations
0
Description
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.
Type
Non-refereed

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