合并如何影响黑洞、星系和其他引力束缚系统之间的质量标度关系
How Mergers May Affect The Mass Scaling Relations Between Black Holes, Galaxies, and Other Gravitationally Bound Systems
摘要：
超大质量黑洞的质量（MBH）与星系的恒星核球质量（Mbulge）密切相关，有几种观点可以解释这种关系的起源。这项研究将星系合并的作用与其他详细物理学的考虑隔离开来，以更清楚地表明，如果星系质量函数随着质量的增加而下降，那么无论原始黑洞是如何在星系内部播种的，线性黑洞-星系质量关系（MBH-Mgal）都可以自然出现。在这种情况下，MBH-Mgal关系是一个被动的吸引子，最终收敛到一个紧密的线性关系，因为两个基本的统计效应：一个中心极限的倾向星系合并，这是更强的主要合并比小合并，和收敛到一个线性关系，主要是由于小合并。这个思想实验的一个奇怪的结果是，如果星系的凸起是由主要的合并形成的，那么合并的统计数据自然会显示MBH与凸起主导的星系的相关性更强，因为更强的中心寻找倾向，而不是与盘主导的星系。即使是其他物理学最终导致了MBH-Mbulge的线性关系，这个思想实验表明，与直觉相反，具有随机BH质量的星系的随机合并倾向于加强而不是削弱预先存在的线性相关性。这个想法可以推广到其他引力束缚系统（暗物质晕，紧凑的核物体），在经历合并后保持其物理身份。
英文摘要：
Supermassive black hole (BH) masses (MBH) are strongly correlated with galaxy stellar bulge masses (Mbulge) and there are several ideas to explain the origin of this relationship. This study isolates the role of galaxy mergers from considerations of other detailed physics to more clearly show how a linear BH-galaxy mass relation (MBH-Mgal) can naturally emerge regardless of how primordial BHs were seeded inside galaxies, if the galaxy mass function declines with increasing mass. Under this circumstance, the MBH-Mgal relation is a passive attractor that eventually converges to a tight linear relation because of two basic statistical effects: a central limit-like tendency for galaxy mergers which is much stronger for major mergers than minor mergers, and a convergence toward a linear relation that is due mainly to minor mergers. A curious consequence of this thought experiment is that, if galaxy bulges are formed by major mergers, then merging statistics naturally show that MBH would correlate more strongly with bulge dominated galaxies, because of stronger central-seeking tendencies, than with disk dominated galaxies. Even if some other physics is ultimately responsible for causing a linear MBH-Mbulge relationship, this thought experiment shows that, counter to intuition, random merging of galaxies that harbor random BH masses tends to strengthen rather than weaken a pre-existing, linear, correlation. This idea may be generalized to other gravitationally bound systems (dark matter halo, compact nuclear objects) that retain their physical identities after experiencing mergers.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
