| Issue |
EPJ Web of Conferences
Volume 19, 2012
Assembling the Puzzle of the Milky Way
|
|
|---|---|---|
| Article Number | 01007 | |
| Number of page(s) | 3 | |
| Section | Dark Matter Question: Milky Way Meets Lambda-CDM Cosmology | |
| DOI | https://doi.org/10.1051/epjconf/20121901007 | |
| Published online | 07 February 2012 | |
https://doi.org/10.1051/epjconf/20121901007
Could M31 be the result of a major merger?
1 Laboratoire GEPI, Observatoire de Paris, CNRS-UMR8111, Univ. Paris-Diderot, 5 place Jules Janssen, 92190 Meudon, France
2 NAOC, Chinese Academy of Sciences, A20 Datun Road, 100012 Beijing, China
a e-mail: sylvain.fouquet@obspm.fr
We investigated a scenario in which M31 could be the remnant of a gas-rich major merger. Galaxy merger simulations, highly constrained by observations, were run using GADGET 2 in order to reproduce M31. We succeeded in reproducing the global shape of M31, the thin disk and the bulge, and in addition some of the main M31 large-scale features, such as the thick disk, the 10 kpc ring and the Giant Stream. This lead to a new explanation of the Giant Stream which could be caused by tidal tail stars that have been captured by the galaxy potential.
© Owned by the authors, published by EDP Sciences, 2012
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