Constraining intermediate-mass black holes from the stellar disc of SgrA*
Constraining intermediate-mass black holes from the stellar disc of SgrA*
复制标题
约束来自 SgrA* 恒星盘的中等质量黑洞
DOI：
10.1093/mnras/stad2783
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发表时间：
2023
影响因子：
4.8
通讯作者：
Zimmerman, Aaron
中科院分区：
文献类型：
--
作者：
Fouvry, Jean-Baptiste;Bustamante-Rosell, María José;Zimmerman, Aaron
围绕超大质量黑洞演化的恒星会看到它们的轨道方向有效地扩散，这个过程称为“矢量共振弛豫”。特别是，在同一圆盘内的恒星，即在方向上相邻的恒星，将通过这种随机过程慢慢地彼此扩散。我们共同使用（i）详细的动力学预测这种稀释的效率和（ii）最近观察到的恒星盘周围的SgrA*，银河系中心的超大质量黑洞，以约束SgrA* 的未观测到的恒星团。值得注意的是，我们定量研究人口的中等质量黑洞的生存能力的恒星盘的影响。
Stars evolving around a supermassive black hole see their orbital orientations diffuse efficiently, a process called ‘vector resonant relaxation’. In particular, stars within the same disc, i.e. neighbours in orientations, will slowly diffuse away from one another through this stochastic process. We use jointly (i) detailed kinetic predictions for the efficiency of this dilution and (ii) the recent observation of a stellar disc around SgrA*, the supermassive black hole at the centre of the Milky Way, to constrain SgrA*’s unobserved stellar cluster. Notably, we investigate quantitatively the impact of a population of intermediate-mass black holes on the survivability of the stellar disc.