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The Metallicity Distribution of the Bulge of M31

Published online by Cambridge University Press:  23 December 2005

P. Jablonka
Affiliation:
Observatoire de Genève, Laboratoire d'Astrophysique de l'Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1290 Sauverny, Switzerland email: pascale.jablonka@obs.unige.ch
A. Sarajedini
Affiliation:
Department of Astronomy, University of Florida, Gainesville, FL 32611, email:ata@astro.ufl.edu
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Abstract

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We present the first metallicity distribution (MDF) derived for the bulge of M31. We have used HST WFPC2 V and I images to construct the color-magnitude diagram of a field located at 1.55 kpc from the center of M31. We have translated the RGB star colors into abundances. We describe the M31 bulge MDF properties, compare them to those of the M31 halo. We discuss the analogy with our Galaxy and the implications for the formation of spiral galaxies.

Type
Contributed Papers
Copyright
© 2005 International Astronomical Union