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Anisotropies of the satellite systems around the Milky Way and Andromeda

Published online by Cambridge University Press:  08 November 2005

Manuel Metz ,
Pavel Kroupa  and
Helmut Jerjen
Manuel Metz
Affiliation:
Sternwarte der Universität Bonn, Auf dem Hügel 71, 53332 Bonn, Germany email: mmetz@astro.uni-bonn.de, pavel@astro.uni-bonn.de
Pavel Kroupa
Affiliation:
Sternwarte der Universität Bonn, Auf dem Hügel 71, 53332 Bonn, Germany email: mmetz@astro.uni-bonn.de, pavel@astro.uni-bonn.de
Helmut Jerjen
Affiliation:
Research School of Astronomy and Astrophysics, Mt. Stromlo Observatory, Australian National University, Cotter Road, Weston ACT 2611, Australia email: jerjen@mso.anu.edu.au
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Abstract

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We have studied the distribution of dwarf-galaxy satellite systems around our Milky Way (MW) and the Andromeda (M31) galaxy. The anisotropy is quantified and the form of their distribution is found to be incompatible with that expected if they were cold-dark-matter sub-structures. The origin of these satellites therefore can not be cosmological. Rather the Milky Way and Andromeda satellites probably stem from a local evolutionary mechanism.

Keywords

Galaxy: evolutionGalaxy: halogalaxies: dwarfgalaxies: formation
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 1 , Colloquium C198: Near-Field Cosmology with Dwarf Elliptical Galaxies , March 2005 , pp. 259 - 260
Copyright
© 2005 International Astronomical Union