| 大质量黑洞吸积盘的径向自引力 |
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| 引用本文： | 杨兰田,刘晓慈.大质量黑洞吸积盘的径向自引力[J].中国天文和天体物理学报,1990(3). |
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| 作者姓名： | 杨兰田 刘晓慈 |
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| 作者单位： | 中国高等科技中心——天文和天体物理中心，华中师范大学物理系 华中师范大学物理系 |
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| 摘 要： | 本文研究了大质量黑洞吸积盘的自引力,用薄盘位形上积分的方法计算了吸积盘自引力的径向与垂向分量,着重讨论了径向自引力。主要结果为:对于大质量黑洞(M～10~8—10~(10)M_⊙)吸积盘,在(R/R_g)～10~5—10~4的距离上,径向自引力会超过中心天体引力。在这个距离上,吸积盘的动力学结构完全不同于开普勒盘。提出了径向自引力不稳定扰动作为一种能源机制。本文还得到吸积盘自引力与中心天体引力量级比较的两个判据,并由此得到大质量黑洞吸积盘外半径的近似解析估计。本文结果可用于类星体和星系核吸积盘。
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| 关 键 词： | 黑洞 自引力 吸积盘 |
Radial Self-Gravity of Accretion Discs Around Supermassive Black Holes |
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| Yang Lantian Liu Xiaoci.Radial Self-Gravity of Accretion Discs Around Supermassive Black Holes[J].Chinese Journal of Astronomy and Astrophysics,1990(3). |
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| Authors: | Yang Lantian Liu Xiaoci |
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| Institution: | World Laboratory |
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| Abstract: | This paper studies the properties of the self-gravity of accretion discs around supermas-sive black holes. On the basis of integration for the thin disc configuration, this paper has calculated the radial and vertical components of the self-gravity of accretion discs. The discussions concentrate mainly on the radial component. This paper has got two criterions for the comparison between the accretion disc self-gravity and the gravity of the central black holes, from which an analytic estimation for the outer radius of the accretion discs has been derived. The result of this paper may be applied to the accretion discs in quasars and AGN. |
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| Keywords: | Black holes-Self-gravity-Accretion discs |
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