arXiv 1601.048612016-01-19astro-ph.GA

在Henize 2-10星系中会形成核恒星盘吗？

Will a nuclear stellar disk form in the galaxy Henize 2-10?

Manuel Arca-Sedda, Roberto Capuzzo-Dolcetta

备注：: 6 pages, 2 figures, 1 table, to be published in the proceedings of the 14th Marcel Grossmann meeting

摘要：

我们提出了一套$N$体模拟的结果，模拟未来的演化的11个年轻的大质量集群托管在中心区域的矮恒星爆发星系Henize 2-10，其中包含在其中心的质量为$M_{\rm BH} \simeq 2\times 10^6$ M $_\odot$的大质量黑洞。核星团存在于大量质量类似于Henize 2-10的星系中。我们的结果表明，Henize 2-10星团的轨道衰变和合并可能导致形成质量为$M_{\rm NSC} \simeq 4-6 \times 10^6$ M $_\odot$，有效半径为$r_{\rm NSC} \simeq 4.1$ pc的核星团.此外，我们发现，这种机制可以导致形成盘状结构的全球性质类似的核恒星盘，这驻留在许多“中等重量”的星系。这项工作证实并扩大了最近的结果\citep{ASCDS15}，表明如何核星团和超大质量黑洞只有部分相关，因为核星团的形成过程是由一个黑洞的大小在Henize 2-10影响不大。一个新的结果是，核星团和核恒星盘可能共享相同的形成路径。

英文摘要：

We present results of a set of $N$-body simulations to model the future evolution of the 11 young massive clusters hosted in the central region of the dwarf starburst galaxy Henize 2-10, which contains at its center a massive black hole with a mass $M_{\rm BH} \simeq 2\times 10^6$ M$_\odot$. Nuclear star clusters are present in a great quantity of galaxies of mass similar to Henize 2-10. Our results \citep{ASCD15} show that the orbital decay and merging of the Henize 2-10 clusters will likely lead to the formation of a nuclear star cluster with mass $M_{\rm NSC} \simeq 4-6 \times 10^6$ M$_\odot$ and effective radius $r_{\rm NSC} \simeq 4.1$ pc. Additionally, we found that this mechanism can lead to the formation of disky structures with global properties similar to those of nuclear stellar disks, which reside in many "middle-weight" galaxies. This work confirms and enlarge recent results \citep{ASCDS15} that indicate how nuclear star clusters and super massive black holes are only partially correlated, since the formation process of nuclear star clusters is poorly affected by a black hole of the size of that in Henize 2-10. A new result is that nuclear star clusters and nuclear stellar disks may share the same formation path.

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摘要：

英文摘要：

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