期刊
PHYSICS OF THE DARK UNIVERSE
卷 2, 期 3, 页码 163-165出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.dark.2013.10.001
关键词
Dark matter; Hidden sector
资金
- Ministry of Education and Science of the Russian Federation
- Russian Federation [NSh-5320.2012.2]
- RFBR [13-02-00418-a]
- Australian Research Council
Recent observations indicate that about half of the dwarf satellite galaxies around M31 orbit in a thin plane approximately aligned with the Milky Way. It has been argued that this observation along with several other features can be explained if these dwarf satellite galaxies originated as tidal dwarf galaxies formed during an ancient merger event. However if dark matter is collisionless then tidal dwarf galaxies should be free of dark matter - a condition that is difficult to reconcile with observations indicating that dwarf satellite galaxies are dark matter dominated. We argue that dissipative dark matter candidates, such as mirror dark matter, offer a simple solution to this puzzle. (C) 2013 The Authors. Published by Elsevier B.V.
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