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The carina project. VII. Toward the breaking of the age-metallicity degeneracy of red giant branch stars using the C U, B, i index

Monelli, M; Milone, Antonino; Fabrizio, Michele; Bono, G; Stetson, Peter B; Walker, Alistair R; Cassisi, S; Gallart, Carme; Nonino, Mario; Aparicio, A; Buonanno, R; Dall'Ora, Massimo

Description

We present an analysis of photometric and spectroscopic data of the Carina dSph galaxy, testing a new approach similar to that used to disentangle multiple populations in Galactic globular clusters (GCs). We show that a proper color combination is able to separate a significant fraction of the red giant branch (RGB) of the two main Carina populations (the old one, 12 Gyr, and the intermediate-age one, 4-8 Gyr). In particular, the c U, B, I = (U-B)-(B-I) pseudo-color allows us to follow the RGB...[Show more]

CollectionsANU Research Publications
Date published: 2014
Type: Journal article
URI: http://hdl.handle.net/1885/76050
Source: Astrophysical Journal, The
DOI: 10.1088/0004-637X/796/2/90
Access Rights: Open Access

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