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Could M31 Come from a Major Merger and Eject the LMC away?

Published online by Cambridge University Press:  05 December 2011

S. Fouquet
Affiliation:
Laboratoire GEPI, Observatoire de Paris, CNRS-UMR8111, Univ. Paris-Diderot 5 place Jules Janssen, 92195 MeudonFrance email: francois.hammer@obspm.fr
F. Hammer
Affiliation:
Laboratoire GEPI, Observatoire de Paris, CNRS-UMR8111, Univ. Paris-Diderot 5 place Jules Janssen, 92195 MeudonFrance email: francois.hammer@obspm.fr
Y. B. Yang
Affiliation:
NAOC, Chinese Academy of Sciences, A20 Datun Road, 100012 Beijing, China
J. L. Wang
Affiliation:
Laboratoire GEPI, Observatoire de Paris, CNRS-UMR8111, Univ. Paris-Diderot 5 place Jules Janssen, 92195 MeudonFrance email: francois.hammer@obspm.fr NAOC, Chinese Academy of Sciences, A20 Datun Road, 100012 Beijing, China
M. Puech
Affiliation:
Laboratoire GEPI, Observatoire de Paris, CNRS-UMR8111, Univ. Paris-Diderot 5 place Jules Janssen, 92195 MeudonFrance email: francois.hammer@obspm.fr
H. Flores
Affiliation:
Laboratoire GEPI, Observatoire de Paris, CNRS-UMR8111, Univ. Paris-Diderot 5 place Jules Janssen, 92195 MeudonFrance email: francois.hammer@obspm.fr
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Abstract

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We investigated a scenario in which M31 could be the remnant of a major merger and at the origin of the LMC. Galaxy merger simulations were run in order to reproduce some M31 properties. We succeeded in reproducing some of the most important M31 large-scale features like the thick disk or the polar ring, and gave a possible explanation for the formation of the Giant Stream. We also found that the LMC could be expelled by this high energetic phenomenon.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2011

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