M31型星系中恒星亚结构与星系合并中卫星形态的关系

IF 0.8 4区物理与天体物理 Q4 ASTRONOMY & ASTROPHYSICS

Serbian Astronomical Journal Pub Date : 2022-01-01 DOI:10.2298/saj220704004m

S. Milosevic

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引用次数: 0

摘要

在螺旋星系的光晕中可以观察到恒星流和恒星壳。在本文中，我们研究了这些结构的形成是由于宿主螺旋星系和它的矮卫星星系之间的合并。我们用两种矮星系形态模型对不同初始位置的n体进行了模拟。一种是球状矮星(dSph)，另一种是带圆盘的矮星。我们发现，这两种模型都形成了恒星壳和恒星流，在有圆盘的祖星系中，恒星流更为突出。经过几条绕心通道后，有可能形成几条溪流。在螺旋祖星系中，祖星系的残余物比在dSph中更有可能在后来的合并中被破坏。

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

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

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来源期刊

Serbian Astronomical Journal ASTRONOMY & ASTROPHYSICS-

CiteScore

1.00

自引率

0.00%

发文量

审稿时长

12 weeks

期刊介绍： Serbian Astronomical Journal publishes original observations and researches in all branches of astronomy. The journal publishes: Invited Reviews - review article on some up-to-date topic in astronomy, astrophysics and related fields (written upon invitation only), Original Scientific Papers - article in which are presented previously unpublished author''s own scientific results, Preliminary Reports - original scientific paper, but shorter in length and of preliminary nature, Professional Papers - articles offering experience useful for the improvement of professional practice i.e. article describing methods and techniques, software, presenting observational data, etc. In some cases the journal may publish other contributions, such as In Memoriam notes, Obituaries, Book Reviews, as well as Editorials, Addenda, Errata, Corrigenda, Retraction notes, etc.