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Carbon stars in the M31 dwarf spheroidals: evolutionary implications

Published online by Cambridge University Press:  08 November 2005

D. Harbeck ,
J.S. Gallagher ,
E.K. Grebel  and
P. Guhathakurta
D. Harbeck
Affiliation:
UC Berkeley, Space Sciences Laboratory, 7 Gauss Way, Berkeley, CA 94720, USA
J.S. Gallagher
Affiliation:
University of Wisconsin, Madison, 475 N. Charter Street, Madison, WI 53706, USA
E.K. Grebel
Affiliation:
Astronomical Institute of the University of Basel, Venusstr. 7, 4102 Binningen, Switzerland
P. Guhathakurta
Affiliation:
UCO/Lick Observatory, UC Santa Cruz, 1156 High Street, Santa Cruz, CA 95064, USA
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Abstract

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We present results of a photometric survey for carbon stars in the M31 dwarf spheroidal galaxies. From the low frequency of carbon stars in these galaxies compared to their Milky Way cousins we conclude that they consist of predominantly ancient stellar populations. However, the complexity and variety of the metallicity distributions in the M31 dwarf spheroidals suggest that they still experienced an extended epoch of star formation.

Keywords

Local Groupdwarf galaxiesstellar populations
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 1 , Colloquium C198: Near-Field Cosmology with Dwarf Elliptical Galaxies , March 2005 , pp. 30 - 34
Copyright
© 2005 International Astronomical Union