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2003MNRAS.345..949W - Mon. Not. R. Astron. Soc., 345, 949-959 (2003/November-1)
UBRI photometry of globular clusters in the Leo group galaxy NGC 3379.
WHITLOCK S., FORBES D.A. and BEASLEY M.A.
Abstract (from CDS):
The Milky Way and M31 reveal blue and red subpopulations, with (U -B)_ o_and (B -I)ocolours indicating mean metallicities similar to those expected based on previous spectroscopic work. The stellar population models of Maraston and Brocato et al. are consistent with both subpopulations being old, and with metallicities of [Fe/H]~-1.5 and -0.6 for the blue and red subpopulations, respectively. The models of Worthey do not reproduce the (U -B)ocolours of the red (metal-rich) subpopulation for any modelled age.
For NGC 3379 we detect a blue subpopulation with similar colours, and presumably age/metallicity, to that of the Milky Way and M31 globular cluster systems. The red subpopulation is less well defined, perhaps due to increased photometric errors, but indicates a mean metallicity of [Fe/H]~-0.6.
Abstract Copyright: 2003 RAS
Journal keyword(s): globular clusters: general - galaxies: individual: NGC 3379 - galaxies: star clusters
VizieR on-line data: <Available at CDS (J/MNRAS/345/949): tablea1.dat>
Nomenclature: Table A1: [WFB2003] NNN (Nos 1-133).
Simbad objects: 140
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