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Numerical Simulations of the Metallicity Distribution in Dwarf Spheroidal Galaxies

Published online by Cambridge University Press:  21 April 2007

E. Emsellem ,
H. Wozniak ,
G. Massacrier ,
J.-F. Gonzalez ,
J. Devriendt ,
N. Champavert ,
E. Ripamonti ,
E. Tolstoy ,
A. Helmi  and
G. Battaglia
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E. Ripamonti*
Affiliation:
Kapteyn Astronomical Institute, University of Groningen;
E. Tolstoy
Affiliation:
Kapteyn Astronomical Institute, University of Groningen;
A. Helmi
Affiliation:
Kapteyn Astronomical Institute, University of Groningen;
G. Battaglia
Affiliation:
Kapteyn Astronomical Institute, University of Groningen;
T. Abel
Affiliation:
Kavli Institute for Particle Astrophysics and Cosmology, Stanford Linear Accelerator Center
*
ripa@astro.rug.nl
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Abstract

Recent observations show that the number of stars with very lowmetallicities in the dwarf spheroidal satellites of the Milky Way islow, despite the low average metallicities of stars in these systems. Weundertake numerical simulations of star formation and metal enrichmentof dwarf galaxies in order to verify whether this result can bereproduced with ”standard” assumptions. The answer is likely to benegative, unless some selection bias against very low metallicity starsis present in the observations.

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