Gamma-Ray Burst Progenitors Confront Observations
Gamma-Ray Burst Progenitors Confront Observations
复制标题
伽马射线爆发的前身面对观测
DOI：
10.1142/9789812704030_0051
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
D. Lazzati
中科院分区：
文献类型：
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作者：
D. Lazzati
在GRB 030329的余辉中发现了一颗超新星，这显然解决了伽马射线爆发祖先的性质问题。我们现在知道，至少有一小部分宇宙学伽马射线暴与大质量恒星的死亡有关，而且这两次爆炸很可能是同时发生的。尽管这种关联已经被认为是针对GRB 980425的，但该爆发的特殊性不允许将这种关联扩展到所有GRB。现在的问题是了解GRB 030329是否是“标准爆发”。我将讨论GRB 030329的一些特点和它的余辉光曲线，显示它看起来更像是一个过渡对象，而不是一个经典的宇宙学GRB，连接像GRB 980425的弱事件到经典的长持续时间GRB。我还将讨论超新星方案所面临的问题，以解释在几个伽玛暴及其余辉中检测到的X射线特征。
The discovery of a supernova emerging at late times in the afterglow of GRB 030329 has apparently settled the issue on the nature of the progenitor of gamma-ray bursts. We now know that at least a fraction of cosmological GRBs are associated with the death of massive stars, and that the two explosions are most likely simultaneous. Even though the association was already suggested for GRB 980425, the peculiarity of that burst did not allow to extend the association to all GRBs. The issue is now to understand whether GRB 030329 is a "standard burst" or not. I will discuss some peculiarities of GRB 030329 and its afterglow lightcurve showing how, rather than a classical cosmological GRB, it looks more like a transition object linking weak events like GRB 980425 to the classical long duration GRBs. I will also discuss the problems faced by the Hypernova scenario to account for the X-ray features detected in several GRBs and their afterglows.