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The Metallicity Distribution of the Bulge of M31

Published online by Cambridge University Press:  23 December 2005

P. Jablonka  and
A. Sarajedini
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.

Keywords

Galaxies: abundancesgalaxies: bulgesgalaxies: stellar content
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 1 , Symposium S228: From Lithium to Uranium: Elemental Tracers of Early Cosmic Evolution , May 2005 , pp. 525 - 530
Copyright
© 2005 International Astronomical Union