星系中心大黑洞的宇宙学演化

在冷暗物质晕等级成团宇宙学模型中,伴随着暗物质晕并合,星系中心黑洞也断地并合和增长.于展Press-Schechter公式（EPS）我们编写了一自适应时间长Monte Carlo程序,重构了表征暗物质晕等级成团并合树.在成功地建立了黑洞和暗物质晕宇宙学演化模型后,我们通过引入直接吸积（包标准薄盘吸积和磁流体力学吸积）和随吸积两类黑洞吸积模式,论了黑洞自旋和质量宇宙学演化.通过与观测到AGN光度函数比较,我们发现黑洞通过磁流体力学吸积模式增长,与观测符合最好.于以上理论框架,我们还研究了双大质量黑洞演化,发现双黑洞通过共转气体吸积盘吸积对双黑洞质量比分存在显著影响.

Cosmological evolution of massive black holes at the center of galaxies

In the cosmological model of the hierarchical structure formation of dark matter halos,the black holes residing at the center of galaxies continue merging and accreting,following the merging of the dark matter halos.Based on the extended Press-Schechter formalism,we have developed a Monte Carlo algorithm with the self-adaptive time step,which could be used to reconstruction the merging tree of dark matter halos.Having introduced the evolutionary history of massive black holes,especially the two kinds of accretion modes：the direct accretion modes which includes the standard thin accretion disk model and the magnetohydrodynamic accretion disk model and the chaotic accretion model,we investigate the cosmological evolution of the spin and masses of massive black holes.Comparing with the observed luminosity function of active galactic nuclei,it is found that the magnetohydrodynamic accretion disk model describe the growth of massive black holes better than the other accretion models.We have also study the evolution of the binaries of massive black holes,and find that the circum-disk of the black hole binaries significantly affect the distribution of their mass ratio.