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arXiv 0812.2813astro-ph
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用雨燕伽玛暴检验冲击波模型

Testing the blast wave model with Swift GRBs

P. A. Curran, R. L. C. Starling, A. J. van der Horst, R. A. M. J. Wijers

摘要:

雨燕伽玛暴光变曲线的复杂结构使得对暴裂的识别以及对暴裂所引起的冲击波的解释比雨燕之前更加困难。我们的目标是识别可能隐藏的断裂,并约束爆炸波参数;电子能量分布p,环爆介质密度分布k,以及持续能量注入指数q。我们这样做,通过比较所观察到的多波长光变曲线和X射线光谱的我们的样品的预测的冲击波模型。我们可以成功地解释所有的爆发,在我们的样本10,除了两个,在这个框架内,我们可以估计,有信心,电子能量分布指数为6的样本。此外,我们确定在一些突发射流中断。对p分布的统计分析表明,即使在最保守的最小分散情况下,这些值也不符合单一的普适值。K值表明,环爆流密度分布不是从只有一个恒定的密度或风样媒体人口。

英文摘要:

The complex structure of the light curves of Swift GRBs has made the identification of breaks, and the interpretation of the blast wave caused by the burst, more difficult than in the pre-Swift era. We aim to identify breaks, which are possibly hidden, and to constrain the blast wave parameters; electron energy distribution, p, density profile of the circumburst medium, k, and the continued energy injection index, q. We do so by comparing the observed multi-wavelength light curves and X-ray spectra of our sample to the predictions of the blast wave model. We can successfully interpret all of the bursts in our sample of 10, except two, within this framework and we can estimate, with confidence, the electron energy distribution index for 6 of the sample. Furthermore we identify jet breaks in a number of the bursts. A statistical analysis of the distribution of p reveals that, even in the most conservative case of least scatter, the values are not consistent with a single, universal value. The values of k suggest that the circumburst density profiles are not drawn from only one of the constant density or wind-like media populations.

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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