A ug 2 00 0 Stellar Populations in the Phoenix Dwarf ( dIrr / dSph ) Galaxy as Observed by HST / WFPC 2 1

Abstract

We present HST/WFPC2 photometry of the central regions of the Phoenix dwarf. Accurate photometry allows us to: 1) confirm the existence of the horizontal branch previously detected by ground-based observations, and use it to determine a distance to Phoenix, 2) clearly detect the existence of multiple ages in the stellar population of Phoenix, 3) determine a… (More)

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