Stellar Populations in Dwarf Spheroidal Galaxies (WC05): Cycle 4 Continuation

Details Stellar Populations in Dwarf Spheroidal Galaxies (WC05): Cycle 4 Continuation Stellar Populations in Dwarf Spheroidal Galaxies (WC05): Cycle 4 Continuation

Jul 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994hst..prop.5637w&link_type=abstract

HST Proposal ID #5637

Physics

Hst Proposal Id #5637 Stellar Populations

Scientific paper

HR diagrams to deep levels using the F555W and F814W filters and the WFC will be used to study the stellar populations of the dwarf spheroidal galaxies Carina, Ursa Minor and Fornax. Aspects to be studied include the star formation histories based on the location and distribution of stars near the main-sequence turnoff; the luminosities, colors, and metallicities of stars on the giant branch; the relation of horizontal-branch morphology to stellar ages and metallicities; distance moduli via main sequence fitting; the absolute magnitude of the horizontal branch; the main- sequence luminosity function; the possible incidence of binaries on the main sequence; and an estimate of the overall mass-to-light ratio and space density of baryonic matter in stars. In Fornax, the proposed field also contains the metal-poor cluster Fornax 4, whose HR diagram and radial density gradient will also be measured.

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