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Issue A&A Volume 431, Number 2, February IV 2005 Page(s) 517 - 521 Section Galactic structure, stellar clusters and populations DOI 10.1051/0004-6361:20041122

A&A 431, 517-521 (2005)
DOI: 10.1051/0004-6361:20041122

The great disk of Milky-Way satellites and cosmological sub-structures

P. Kroupa^{1, 2}, C. Theis^{1, 3} and C. M. Boily<sup>4

1</sup>  Institut für Theoretische Physik und Astrophysik der Universität Kiel, 24098 Kiel, Germany
    e-mail: pavel@astro.uni-bonn.de
²  Sternwarte Bonn, Auf dem Hügel 71, 53121 Bonn, Germany
³  Institut für Astronomie der Univ. Wien, Türkenschanzstr. 17, 1180 Vienna, Austria
    e-mail: theis@astro.univie.ac.at
⁴  Observatoire Astronomique de Strasbourg, 11 rue de l'Université, 67000 Strasbourg, France
    e-mail: cmb@pleiades.u-strasbg.fr

(Received 20 April 2004 / Accepted 13 October 2004 )

Abstract
We show that the shape of the observed distribution of Milky Way (MW) satellites is inconsistent with their being drawn from a cosmological sub-structure population with a confidence of 99.5 per cent. Most of the MW satellites therefore cannot be related to dark-matter dominated satellites.

Key words: Galaxy: evolution -- Galaxy: halo -- galaxies: dwarf -- galaxies: kinematics and dynamics -- galaxies: Local Group -- Galaxy: formation

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© ESO 2005

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