On the diversity of short gamma‐ray bursts
On the diversity of short gamma‐ray bursts
复制标题
短伽马射线暴的多样性
DOI：
10.1046/j.1365-8711.2003.06889.x
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发表时间：
2003
影响因子：
4.8
通讯作者：
E. Ramirez
中科院分区：
文献类型：
--
作者：
S. Rosswog;E. Ramirez
利用双中子星系统末次激发阶段和最终合并阶段的流体力学模拟，研究了中微子驱动的风的能量、νν湮灭产生的火球的能量和动量，以及它们相互作用的强度和特征。有人争辩说，从碎片中流出的物质将有足够的压力来准直其周围的相对论火球。然后，对于光束内的观察者来说，低光度的相对论喷流将显得更亮，尽管该事件的大部分能量都在看不见的、较少准直的和较慢的风中。这一模型对宇宙距离处的短伽马射线爆发所隐含的各向同性亮度进行了简单的物理解释。各种各样的爆发现象可以归因于中微子光度对双中子星双星初始质量的依赖。
Hydrodynamical simulations of the last inspiral stages and the final coalescence of a double neutron star system are used to investigate the power of the neutrino-driven wind, the energy and momentum of the fireball produced via νν annihilation, and the intensity and character of their interaction. It is argued that the outflow that derives from the debris will have enough pressure to collimate the relativistic fireball it surrounds. Then the low-luminosity relativistic jet will appear brighter to an observer within the beam, although most of the energy of the event is in the unseen, less collimated and slower wind. This model leads to a simple physical interpretation of the isotropic luminosities implied for short gamma-ray bursts at cosmological distances. A wide variety of burst phenomenology could be attributable to the dependence of the neutrino luminosity on the initial mass of the double neutron star binary.