Uv-Bright Stars in Leo I

Details Uv-Bright Stars in Leo I Uv-Bright Stars in Leo I

Jul 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994hst..prop.5153d&link_type=abstract

HST Proposal ID #5153

Physics

Hst Proposal Id #5153 Galaxies &Amp, Clusters Stellar Populations

Scientific paper

FOC ultraviolet images have resolved PAGB (Post-Asymptotic-Giant- Branch) stars in the inner bulge of the galaxy M31. These stars, however, contribute to less than 20 % of the total observed UV flux. The bulk of the UV emission should be explained by stars which, in metal-rich population, are predicted to move from the giant branch to the left of the HR diagram while skipping the AGB (Asymptotic-Giant-Branch) either partially or totally. The dwarf spheroidal galaxy Leo I provides an opportunity to resolve these categories of stars at intrinsically fainter level than possible in M31, down to the AGB-manque or HB phases of evolution. Observations will be performed with the FOC and the WFPC2 in parallel mode.

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