| 不同质量比并合对黑洞自旋演化的影响 |
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| 引用本文： | 张金金,杜璞,王建民.不同质量比并合对黑洞自旋演化的影响[J].天文学报,2009,50(3). |
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| 作者姓名： | 张金金 杜璞 王建民 |
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| 作者单位： | 1. 武汉大学物理科学与技术学院,武汉,430072
2. 中国科学院粒子天体物理重点实验室,北京,100049;中国科学院高能物理研究所粒子天体物理中心,北京,100049 |
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| 基金项目： | 973项目，国家自然基金项目NSFC-10733010与NSFC-10521001资助 |
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| 摘 要： | 研究了在仅有并合时黑洞自旋的演化分布.利用了后牛顿近似处理并合后的角动量问题,采用蒙特卡洛方法模拟了不同条件下的并合影响.结果表明主并合不能使黑洞自旋分布稳定,而小并合可使黑洞自旋平稳地降低.当取并合质量比为幂指数形式时黑洞自旋分布可以稳定在-个小自旋占绝对份额的水平,同时,也讨论了射电强活动星系核和黑洞自旋在不同假设下的关系.最后计算并给出了射电噪度的分布情况.
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| 关 键 词： | 黑洞物理 射电连续谱 星系 核 |
Influence of Different Mass-ratio Merges on Spins of Black Holes |
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| ZHANG Jin-jin,DU Pu,WANG Jian-min.Influence of Different Mass-ratio Merges on Spins of Black Holes[J].Acta Astronomica Sinica,2009,50(3). |
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| Authors: | ZHANG Jin-jin DU Pu WANG Jian-min |
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| Abstract: | The distribution of massive black hole spins only in consideration of merges in their evolution is discussed. The model used in this paper follows Blandford (2003) and Wilson (1994) to treat the angular momentum via post-Newton approximation. Using Monte Carlo simulation, the results in different merge conditions are obtained. Major mergers can cause abrupt changes of black holes spins, but minor mergers always smoothly slow the spin down. The distribution of black hole spins can stay in a stable level under the assumption that the distribution of mass-ratio in merging is in form of a power-law function. According to the stimulation results, the possible relationship between radio-loud active galactic nucleus (AGNs) and black hole spins is also discussed. At last, the distribution of radio-loudness is computed and discussed. |
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| Keywords: | Black Hole Physics Radio Continuum Galaxies Nuclei |
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