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arXiv 1302.2083astro-ph.HEastro-ph.CO
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GRB余辉的线偏振和圆偏振观测

Linear and circular polarimetry observations of GRB afterglows

K. Wiersema

摘要:

在雨燕卫星的协助下,对大量的伽马射线暴余辉进行了后续观测,获得了大量的光谱能量分布和光变曲线样本,从中可以得出余辉的基本微观和宏观物理参数。然而,许多现象已经被观察到,无法用简单版本的标准火球模型来解释,导致了各种新的模型。旋光法作为余辉物理学的一种诊断方法,在探测余辉的磁场特性和几何效应(如射流中断)方面显示出了巨大的前景。不幸的是,很难获得高质量的余辉样品的偏振测量,需要专门的仪器和观测模式。在本文中,我将回顾最近的成功,在后期余辉偏振,也显示了新的仪器和观测活动的第一个结果。我将特别关注喷气式飞机的休息。

英文摘要:

Follow-up observations of large numbers of gamma-ray burst (GRB) afterglows, facilitated by the Swift satellite, have produced a large sample of spectral energy distributions and light curves, from which the basic micro- and macrophysical parameters of afterglows may be derived. However, a number of phenomena have been observed that defy explanation by simple versions of the standard fireball model, leading to a variety of new models. Polarimetry has shown great promise as a diagnosis of afterglow physics, probing the magnetic field properties of the afterglow and geometrical effects (e.g. jet breaks). Unfortunately, high quality polarimetry of a significant sample of afterglows is difficult to acquire, requiring specialised instrumentation and observing modes. In this paper I will review the recent successes in late-time afterglow polarimetry, also showing first results of new instruments and observing campaigns. I will particularly focus on jet breaks.

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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