Comparing the old Stellar Population in Globulars and Dwarf Galaxies: The Cases of Phoenix and Leo A

Details Comparing the old Stellar Population in Globulars and Dwarf Galaxies: The Cases of Phoenix and Leo A Comparing the old Stellar Population in Globulars and Dwarf Galaxies: The Cases of Phoenix and Leo A

2002-09-13

arxiv.org/abs/astro-ph/0209260v1

Astronomy and Astrophysics

Astrophysics

2 page contribution to conference "New Horizons in Globular Cluster Astronomy", Padua, June 2002 ed. G. Piotto, G. Meylan, G.

Scientific paper

Due to their star formation history (SFH), the stellar population in Dwarf Galaxies (DG) is likely to have a metallicity spread which is best traced by the morphology of the Red Giant Branch (RGB). We probe here a purely empirical approach aimed at estimating average metallicity (Z) and Z spread by comparing the Color-Magnitude Diagrams (CMD) of galactic Globular Clusters (GCs) with those of two DGs: Leo A (HST data) and Phoe (VLT Fors2 data).

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