Dermer 2007 喷流与外部介质云作用产生暴本身和耀发辐射

主要内容:
提出一个图景：喷流在向外coasting的阶段与分布于不同地方（且不同方位角）和不同密度的致密介质云发生碰撞，产生的辐射根据发生的半径r不同而表现为暴本身或者是XRFs。类似于标准模型，文章详细计算了所产生的辐射，并可拟合暴本身的光变曲线（肯定参数一大堆）。

精彩摘抄:


文章信息:
Nonthermal Synchrotron Radiation from Gamma Ray Burst External Shocks and the X-ray Flares Observed with Swift

Authors: Charles D. Dermer

(Submitted on 9 Mar 2007)

Abstract: An analysis of the interaction between a spherical relativistic blast-wave shell and a stationary cloud with a spherical cap geometry is performed assuming that the cloud width <<> 0, where \Delta_0 + \eta x/\Gamma_0^2 is the blast-wave shell width), and perhaps in the thin-shell approximation (\eta ~ 1/\Gamma_0), but not when \eta ~ 1. If this approximation is valid, then external shock processes could make the dominant prompt and afterglow emissions in GRB light curves, consistent with short delay two-step collapse models for GRBs.

Comments:

19 pages, 11 figures, submitted to ApJ

Subjects:

Astrophysics (astro-ph)

Cite as:

arXiv:astro-ph/0703223v1