Curran 2009 电子谱指数的分布

主要内容:
仅对Swift的暴, 中心值p=2.36 +- 0.6

精彩摘抄:


文章信息:

arXiv:0908.0891 [ps, pdf, other]

Title: On the electron energy distribution index of Swift GRBs

Authors: P.A. Curran (1), P.A. Evans (2), M.J. Page (1), M. de Pasquale (1), A.J. van der Horst (3) ((1) MSSL-UCL, (2) U Leicester, (3) NSSTC-NASA)

Comments: 5 pages, submitted to MNRAS

Subjects: High Energy Astrophysical Phenomena (astro-ph.HE)

The electron energy distribution index, p, is a fundamental parameter of the synchrotron emission from a range of astronomical sources. There is division as to whether it has a universal value or if it has a distribution and if so, what that distribution is. Here we examine one such source of synchrotron emission, Gamma-Ray Burst afterglows observed by the Swift satellite. We examine the constraints placed on the distribution of p by the observed spectral indices and parametrise the distribution. We find that the observed distribution of spectral indices are inconsistent with an underlying distribution of p composed of a single discrete value but consistent with a Gaussian distribution centred at p = 2.36 and having a width of 0.59. Furthermore, we find that the majority (<>