Dependence of stellar substructures in M31 type galaxy on satellite morphology in galaxy mergers

Serbian Astronomical Journal

article

Milošević S.¹ 

[1] University of Belgrade, Department of Astronomy at Faculty of Mathematics

关键词: Galaxies: interactions;    Galaxies: dwarf;    Methods: numerical;   

DOI  :  10.2298/SAJ220704004M

来源: Astronomical Observatory, Department of Astronomy, Belgrade

【 摘 要 】

Stellar streams and shells are observed in halos of spiral galaxies. In this paper, weinvestigated the formation of these structures due to mergers between the host spiral galaxy and itsdwarf satellite galaxies. We run the N-body simulations with two morphological models of a dwarfgalaxy for different initial positions. One model is a spheroidal dwarf, dSph, and the other is a dwarfwith a disk. We found that both models form stellar shells and streams and, in the case of the progenitorwith a disk, streams are more prominent. After several pericentric passages, there is a possibility offormation of several streams. The remnant of the progenitor is more likely to disrupt later into themerger in the case of spiral progenitor than in the case of dSph.

【 授权许可】

CC BY-NC-ND