The roles of ram-pressure stripping and minor mergers in the evolution of galaxies
The roles of ram-pressure stripping and minor mergers in the evolution of galaxies
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冲压压力剥离和小合并在星系演化中的作用
DOI：
10.1017/s1743921304001164
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
M. Nagashima
中科院分区：
文献类型：
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作者：
T. Okamoto;M. Nagashima
我们结合无耗散 $N$ 体模拟和半解析星系形成模型，研究环境对 $\Lambda$ 主导的冷暗物质宇宙中明亮星团星系演化的影响。我们将冲压压力剥离（RPS）和小合并引起的小星暴（小爆发）的影响纳入我们的模型中。通过考虑小爆发，成功地再现了观察到的形态-半径关系。当我们不考虑小突发时，RPS 几乎不会增加中间 B/T 群体。此外，如果恒星形成时间尺度选择得当，RPS和小爆发对于星团核心星系的颜色或恒星形成率并不重要，因为恒星形成已被冷气体的消耗充分抑制。我们还发现核球主导星系中的SF主要是由所有环境中的重大合并引起的星暴终止的。要搜索作者的其他文章，请访问：http://adsabs.harvard.edu/abstract_service.html
We investigate environmental effects on evolution of bright cluster galaxies in a $\Lambda$-dominated cold dark matter universe using a combination of dissipationless $N$-body simulations and a semi-analytic galaxy formation model. We incorporate effects of ram-pressure stripping (RPS) and minor merger-induced small starburst (minor burst) into our model. By considering minor burst, the observed morphology-radius relation is successfully reproduced. When we do not consider minor burst, the RPS hardly increases the intermediate B/T population. In addition, the RPS and minor burst are not important for colours or star formation rates of galaxies in the cluster core if star formation time-scale is properly chosen, because the star formation is sufficiently suppressed by consumption of the cold gas. We also find that SF in bulge-dominated galaxies is mainly terminated by starburst induced by major mergers in all environments.To search for other articles by the author(s) go to: http://adsabs.harvard.edu/abstract_service.html