与超新星成协的伽玛暴暴后光学色指数的演化

发布时间：2018-03-07 05:27

本文选题：伽玛射线暴　切入点：超新星　出处：《广西大学》2016年硕士论文　论文类型：学位论文

【摘要】：本文第一章介绍伽玛暴的观测与基本理论,第二章介绍超新星的基本理论知识以及它与超新星的成协,第三章介绍我的工作,第四章是对未来工作的展望。目前主流理论模型认为长暴来自于大质量恒星塌缩,并且得到了观测证实。至今已观测到伽玛暴与超新星成协的事件一共有17个。伽玛暴／超新星成协不仅证实了这些伽玛暴起源于大质量恒星的塌缩,而且提供了观测超新星早期辐射的难得机遇。我们分析14个光学观测数据比较好的伽玛暴／超新星观测数据,研究它们的色指数演化行为,发现：(1)色指数在余辉主导阶段一般无演化行为,与Simon等人2001年分析的典型暴色指数演化行为一致,表明与超新星成协的伽玛暴和普通的伽玛暴暴周环境一致；(2)伽玛暴余辉衰减到一定程度、而超新星鼓包也未呈现前,4个暴的色指数演化变红,到了超新星鼓包变红尤为显著,我们认为超新星鼓包前的变红行为可能是由于超新星的激波突破(shock breakout)的后冷却辐射；(3)我们发现超新星的光变峰值时间和色指数演化的峰值时间并不同时,光变峰值时间一般要比色指数的峰值时间早。我们还研究了伽玛暴各向同性能与相应的超新星峰值光度的关系、光变峰值时间色指数与伽玛暴各向同性能的关系、光变峰值时间色指数与超新星峰值光度的关系,但发现它们并没有相关性。
[Abstract]:The first chapter introduces the observation and basic theory of gamma-ray burst, the second chapter introduces the basic theoretical knowledge of supernova and its association with supernova, the third chapter introduces my work. Chapter 4th is the outlook for future work. Current mainstream theoretical models suggest that long bursts come from massive star collapses. And it has been confirmed by observations. So far, there have been 17 observed events that have been associated with supernova formation. The gamma-ray storm / supernova association has not only confirmed that these gamma-ray storms originated from the collapse of massive stars. It also provides a rare opportunity to observe the early radiation of supernova. We analyze 14 optical observational data of gamma burst / supernova and study their color exponent evolution behavior. It is found that there is no evolutionary behavior of the color index in the dominant stage of afterglow, which is consistent with the evolution behavior of the typical storm color index analyzed by Simon et al in 2001. The results show that the afterglow of the gamma-ray bursts associated with supernova and that of the ordinary gamma-ray storms attenuates to a certain extent, and before the appearance of the supernova bulge, the chromatic exponents of the four bursts turn red, especially when the supernova bulges turn red. We believe that the reddish behavior of the supernova before the bulge may be due to the shock shock breakout of the supernova after cooling radiation. (3) We have found that the peak time of photodegradation and the peak time of the color index evolution of the supernova are different from each other. We also study the relationship between the isotropic energy of gamma storm and the corresponding peak luminosity of supernova, and the relationship between the color index of phototropic peak value and isotropic energy of gamma storm. The relationship between the peak time chromatic index and the peak luminosity of supernova, but it is found that there is no correlation between them.
【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】：P172.3;P145.3

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