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arXiv 0811.0244astro-ph
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星系核球中超大质量黑洞的质量和平均速度色散关系

Mass and Mean Velocity Dispersion Relations for Supermassive Black Holes in Galactic Bulges

Yu-Qing Lou, Yan-Fei Jiang

摘要:

越来越多的证据表明,$M_{\rm BH}$ $\sim 10^6-10^{10}M_{\odot}$质量范围内的超大质量黑洞(SMBH)潜伏在许多星系的中央隆起中。大量的观测揭示了$M_{\rm BH}$与主核球的平均恒星速度色散$σ$的相当紧密的幂律关系。一个隆起的动态演化和中央SMBH的形成应该通过各种观测线索在物理上联系起来。在这方面的贡献,我们重现的经验$M_{\rm BH}-σ$幂律的基础上,一个自相似的一般多变的准静态隆起的演变和形成一个SMBH周围的一般奇异多变球(SPS)\cite{loujiang2008}的中心密度奇异性的明智的标准。主机凸起和中央SMBHs的其他属性也进行了检查。基于我们的模型,我们讨论了内在的分散性的$M_{\rm BH}-σ$关系和一个方案的演变SMBH在不同的主机凸起。

英文摘要:

Growing evidence indicate supermassive black holes (SMBHs) in the mass range of $M_{\rm BH}$$\sim 10^6-10^{10}M_{\odot}$ lurking in central bulges of many galaxies. Extensive observations reveal fairly tight power laws of $M_{\rm BH}$ versus the mean stellar velocity dispersion $σ$ of the host bulge. The dynamic evolution of a bulge and the formation of a central SMBH should be physically linked by various observational clues. In this contribution, we reproduce the empirical $M_{\rm BH}-σ$ power laws based on a self-similar general polytropic quasi-static bulge evolution and a sensible criterion of forming a SMBH surrounding the central density singularity of a general singular polytropic sphere (SPS) \cite{loujiang2008}. Other properties of host bulges and central SMBHs are also examined. Based on our model, we discuss the intrinsic scatter of the $M_{\rm BH}-σ$ relation and a scenario for the evolution of SMBHs in different host bulges.

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