The halo occupation distribution of black holes

被引:14
|
作者
Degraf, C. [1 ]
Oborski, Matthew [1 ]
Di Matteo, Tiziana [1 ]
Chatterjee, Suchetana [2 ]
Nagai, Daisuke [2 ,3 ]
Richardson, Jonathan [2 ,3 ]
Zheng, Zheng [3 ]
机构
[1] Carnegie Mellon Univ, McWilliams Ctr Cosmol, Pittsburgh, PA 15213 USA
[2] Yale Univ, Dept Astron, New Haven, CT 06520 USA
[3] Yale Univ, Dept Phys, New Haven, CT 06520 USA
基金
美国国家科学基金会;
关键词
black hole physics; methods: numerical; galaxies: active; galaxies: evolution; galaxies: haloes; quasars: general; PHOTOMETRICALLY CLASSIFIED QUASARS; ACTIVE GALACTIC NUCLEI; COSMOLOGICAL SIMULATIONS; CLUSTERING ANALYSES; STAR-FORMATION; STELLAR MASS; GALAXY; EVOLUTION; LUMINOSITY; REDSHIFT;
D O I
10.1111/j.1365-2966.2011.19157.x
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We investigate the halo occupation distribution (HOD) of black holes (BHs) within a hydrodynamic cosmological simulation that directly follows BH's growth. Similar to the HOD of galaxies/subhaloes, we find that the occupation number of a BH can be described by the form N-BH alpha 1 + (M-Host)(alpha), where alpha evolves mildly with redshift indicating that a given mass halo (M-Host) at low redshift tends to host fewer BHs than at high redshift (as expected as a result of galaxy and BH mergers). We further divide the occupation number into contributions from BHs residing in central and satellite galaxies within a halo. The distribution of M-BH within haloes tends to consist of a single massive BH (distributed about a peak mass strongly correlated with M-Host) and a collection of relatively low-mass secondary BHs, with a weaker correlation with M-Host. We also examine the spatial distribution of BHs within their host haloes and find that they typically follow a power-law radial distribution (i.e. much more centrally concentrated than the subhalo distribution). Finally, we characterize the host mass for which BH's growth is feedback dominated (e.g. star formation quenched). We show that haloes with M-Host > 3 x 10(12) M-circle dot have primary BHs that are feedback dominated by z similar to 3, with lower mass haloes becoming increasingly more affected at lower redshift.
引用
收藏
页码:1591 / 1600
页数:10
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