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arXiv 0909.0269astro-ph.GA
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超大质量黑洞质量与宿主星系总引力质量的关系

A Relationship between Supermassive Black Hole Mass and the Total Gravitational Mass of the Host Galaxy

Kaushala Bandara, David Crampton, Luc Simard

摘要:

研究了中心超大质量黑洞的质量与宿主星系总引力质量(M_tot)之间的相关性.这些结果是基于SLACS巡天中的43个星系尺度强引力透镜的结果,其中黑洞质量是通过两个标度关系:黑洞质量与Sersic指数的关系(M_bh - n)和黑洞质量与恒星速度色散的关系(M_bh - sigma)估算的。我们使用封闭的质量内的R_200,半径内的早期类型的星系的密度分布超过临界密度的宇宙的一个因素的200,确定的引力透镜模型拟合到HST成像数据,作为总的引力质量的示踪剂。在M_bh的2个数量级上,最佳拟合相关性为log(M_bh)=(8.18 +/-0.11)+(1.55 +/-0.31)(log(M_tot)-13.0),其中M_bh由M_bh - sigma关系确定。从各种测试中,我们发现,我们不能可靠地推断出M_bh和M_tot之间的连接从M_bh-n关系。M_bh - M_tot关系为验证超大质量黑洞的性质是由宿主星系的晕性质决定的这一预言提供了一些第一批直接的观测证据。

英文摘要:

We investigate the correlation between the mass of a central supermassive black hole and the total gravitational mass of the host galaxy (M_tot). The results are based on 43 galaxy-scale strong gravitational lenses from the Sloan Lens ACS (SLACS) Survey whose black hole masses were estimated through two scaling relations: the relation between black hole mass and Sersic index (M_bh - n) and the relation between black hole mass and stellar velocity dispersion (M_bh - sigma). We use the enclosed mass within R_200, the radius within which the density profile of the early type galaxy exceeds the critical density of the Universe by a factor of 200, determined by gravitational lens models fitted to HST imaging data, as a tracer of the total gravitational mass. The best fit correlation, where M_bh is determined from M_bh - sigma relation, is log(M_bh) = (8.18 +/- 0.11) + (1.55 +/- 0.31) (log(M_tot) - 13.0) over 2 orders of magnitude in M_bh. From a variety of tests, we find that we cannot reliably infer a connection between M_bh and M_tot from the M_bh - n relation. The M_bh - M_tot relation provides some of the first, direct observational evidence to test the prediction that supermassive black hole properties are determined by the halo properties of the host galaxy.

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