潮汐瓦解事件光变的相关研究

发布时间：2018-07-21 10:40

【摘要】：潮汐瓦解事件是超大质量黑洞潮汐瓦解一颗普通恒星所产生的天体活动现象。潮汐瓦解事件源Swift J1644+57的X射线辐射遵循t-5/3衰减规律,和理论预言一致,是当前被证认的一个潮汐瓦解事件源。然而,其X射线光变曲线上存在着非常剧烈的涨落行为,对这些涨落的研究有助于揭示潮汐瓦解相关过程的动力学行为。本硕士论文主要关注这些涨落行为,并尝试给出一定的解释。在黑洞双星和活动星系核中,吸积盘产生的X射线辐射或喷流的辐射均展现出剧烈的非周期振荡行为。对于这种现象,当前比较合理的模型有Lyubarskii所提出的吸积盘吸积率涨落传播模型,因此我们研究这种机制是否会在潮汐瓦解所形成的吸积盘中存在,并产生我们所能观测到的耀发现象。本论文第一章介绍潮汐瓦解事件的理论研究和观测特征。第二章介绍我们在潮汐瓦解事件方面所进行的一些研究工作,包括：(1)Swift J1644+57 上 T-5/3衰减光变曲线上,涨落的功率谱分析,我们得到的结果显示其功率谱为P～f-1.2,与黑洞双星和活动星系核的X射线光变行为一样,都是非周期的振荡行为；(2)物质环吸积的光变行为研究,并分析其下降段的功率谱,得到的结果也是P～f-1.2,与Swift J1644+57所观测到的结果一致。这在一定程度上暗示Swift J1644+57下降段的光变行为可能源于吸积盘的吸积率的涨落。因此,我们试图作进一步的研究,基于我们所总结出来的回落物质的回落函数,研究有回落物质时所形成的辐射应该表现出怎样的光变行为,这个工作正在进行。另外,我们将物质环的吸积模型用于伽玛射线暴环境,以研究伽玛射线暴瞬时辐射光变的起源。
[Abstract]:Tidal collapse is a phenomenon of celestial activity caused by the tidal disintegration of a supermassive black hole. The X-ray radiation of Swift J164457 follows the law of t-5 / 3 attenuation, which is consistent with the theoretical prediction and is a recognized source of tidal disintegration event. However, there are very violent fluctuations on the X-ray light curves, and the study of these fluctuations is helpful to reveal the dynamic behavior of the processes associated with tidal disintegration. This thesis focuses on these fluctuations and tries to explain them. In black hole binaries and active galactic nuclei (AGNs), the accretion disk produces both X-ray radiation and jet radiation, which exhibit intense aperiodic oscillations. For this phenomenon, the current more reasonable model is the accretion disk accretion rate fluctuation propagation model proposed by Lyubarskii, so we study whether this mechanism exists in the accretion disk formed by tidal disintegration. And produce what we can see. The first chapter of this paper introduces the theoretical research and observational characteristics of tidal collapse events. In the second chapter, we introduce some research work on tidal collapse events, including: (1) the power spectrum analysis of fluctuation on T-5 / 3 attenuated light curve on Swift J164457. Our results show that the power spectrum is Pnf-1.2, which is aperiodic oscillating like the X-ray photoluminescence behavior of black hole binaries and active galactic nuclei. (2) the accretion behavior of mass rings is studied, and the power spectrum of its descending section is analyzed. The results obtained are also in accordance with those observed in Swift J164457. This indicates to some extent that the phototropic behavior of the descending segment of Swift J164457 may be due to the fluctuation of accretion rate of the accretion disk. Therefore, we try to further study, based on the pullback function of the falling matter, we are working on how the radiation formed by the falling matter should exhibit the phototropic behavior. In addition, we apply the accretion model of matter rings to the gamma-ray burst environment to study the origin of the instantaneous radiative light variation of the gamma-ray burst.
【学位授予单位】：广西大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：P145.8

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