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Disk dwarf galaxy as the progenitor of the Andromeda giant stream

Published online by Cambridge University Press:  09 May 2016

Takanobu Kirihara ,
Yohei Miki ,
Masao Mori  and
Toshihiro Kawaguchi
Takanobu Kirihara
Affiliation:
Faculty of Pure and Applied Physics, University of Tsukuba, Tennodai 1-1-1, Tsukuba, Ibaraki, Japan email: kirihara@ccs.tsukuba.ac.jp
Yohei Miki
Affiliation:
Center for Computational Sciences, University of Tsukuba, Tennodai 1-1-1, Tsukuba, Ibaraki, Japan
Masao Mori
Affiliation:
Faculty of Pure and Applied Physics, University of Tsukuba, Tennodai 1-1-1, Tsukuba, Ibaraki, Japan email: kirihara@ccs.tsukuba.ac.jp Center for Computational Sciences, University of Tsukuba, Tennodai 1-1-1, Tsukuba, Ibaraki, Japan
Toshihiro Kawaguchi
Affiliation:
Sapporo Medical University, S1W17, Chuoh-ku, Sapporo, Hokkaido, Japan
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Abstract

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We present a study of the morphology of a progenitor galaxy that has been disrupted and formed a giant southern stellar stream in the halo of Andromeda galaxy(M31). N-body simulations of a minor merger of M31 with a dwarf galaxy suggest that the progenitor's rotation plays an important role in the formation of an asymmetric surface brightness distribution of the stream.

Keywords

galaxies: individual (M31)galaxies: interactionsgalaxies: kinematics and dynamics

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