Almost all galaxies along the Hubble sequence host a compact massive object (CMO) in their center. The CMO can be either a supermassive black hole (SMBH) or a very dense stellar cluster, also known as nuclear star cluster (NSC). Generally, heavier galaxies (mass > 10~(11) M_⊙) host a central SMBH while lighter show a central NSC. Intermediate mass hosts, instead, contain both a NSC arid a SMBH. One possible forination mechanisms of a NSC relies on the dry-merger (migratory) scenario, in which globular clusters (GCs) decay toward the center of the host galaxy and merge. In this framework, the absence of NSCs in high-mass galaxies can be imputed to destruction of the infalling GCs by the intense tidal field of the central SMBH. In this work, we report preliminary results of N-body simulations performed using our high-resolution, direct, code HiGPUs, to investigate the effects of a central SMBH on a single GC orbiting around it. By varying either the mass of the SMBH and the mass of the host galaxy, we derived an upper limit to the mass of the central SMBH, and thus to the mass of the host, above which the formation of a NSC is suppressed.
展开▼
机译：沿哈勃序列的几乎所有星系都在其中心主持紧凑的大量物体（CMO）。 CMO可以是超迹象的黑洞（SMBH）或非常致密的恒星簇，也称为核星簇（NSC）。一般来说，较重的星系（质量> 10〜（11）m_⊙）主持一个中央SMBH，而打火机则显示中央NSC。相反，中间群众宿主包含一个NSC ARID A SMBH。 NSC的一种可能的前导机制依赖于干预（迁移）场景，其中球形集群（GCS）朝向主机星系和合并的中心衰减。在该框架中，通过中央SMBH的激烈的潮汐场，可以抵御高肿块星系中的NSCs的不存在。在这项工作中，我们报告了使用我们的高分辨率直接，代码HIGPU进行的N-Stoci模拟的初步结果，以研究中央SMBH对其周围的单个GC轨道的影响。通过改变SMBH的质量和宿主星系的质量，我们得到了中央SMBH的质量的上限，从而达到了宿主的质量，上述宿主的质量抑制了NSC的形成。
展开▼
