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arXiv 0801.1325astro-ph
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RMHD研究GRB的瞬发和余辉相变

An RMHD study of transition between prompt and afterglow GRB phases

Petar Mimica, Dimitrios Giannios, Miguel-Angel Aloy

摘要:

我们通过相对论磁流体动力学模拟研究了伽玛暴的余辉相。传播到一个均匀的外部介质的相对论性壳的演变。我们专注于喷出物的磁化效果上的喷出物外部介质相互作用的初始阶段。特别是,我们正在研究的条件下存在的反向冲击到喷出物,时间尺度的能量从壳转移到冲击介质和由此产生的多波长光变曲线。为此,我们已经开发了一种新的计划,包括非热过程耦合到相对论磁流体动力学代码MRGENESIS,以计算非热同步辐射。

英文摘要:

We study the afterglow phases of a GRB through relativistic magnetohydrodynamic simulations. The evolution of a relativistic shell propagating into a homogeneous external medium is followed. We focus on the effect of the magnetization of the ejecta on the initial phases of the ejecta-external medium interaction. In particular we are studying the condition for the existence of a reverse shock into the ejecta, the timescale for the transfer of the energy from the shell to the shocked medium and the resulting multiwavelength light curves. To this end, we have developed a novel scheme to include non-thermal processeses which is coupled to the relativistic magnetohydrodynamic code MRGENESIS in order to compute the non-thermal synchrotron radiation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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