Zou 2008 GRB080319B的瞬时辐射的不可能的模型

主要内容:
SSC不行, 双成份的电子都辐射同步也不行. 总之, 辐射伽玛射线的电子和辐射光学的电子不能来自同一个区域.

精彩摘抄:


文章信息:

· Find Similar Abstracts (with default settings below)

· arXiv e-print (arXiv:0812.0318)

· References in the Article

·

· Translate This Page

Title:		Clues from the prompt emission of GRB 080319B
Authors:		Zou, Y. C.; Piran, T.; Sari, R.
Publication:		eprint arXiv:0812.0318
Publication Date:		12/2008
Origin:		ARXIV
Keywords:		Astrophysics
Bibliographic Code:		2008arXiv0812.0318Z

Abstract

The extremely bright optical flash that accompanied GRB 080319B suggested, at first glance, that the prompt $\gamma$-rays in this burst were produced by Synchrotron self Compton (SSC). We analyze here the observed optical and $\gamma$ spectrum. We find that the very strong optical emission poses, due to self absorption, very strong constraints on the emission processes and put the origin of the optical emission at a very large radius, almost inconsistent with internal shock. Alternatively it requires a very large random Lorentz factor for the electrons. We find that SSC could not have produced the prompt $\gamma$-rays. We also show that the optical emission and the $\gamma$ rays could not have been produced by synchrotron emission from two populations of electron within the same emitting region. Thus we must conclude that the optical and the $\gamma$-rays were produced in different physical regions. A possible interpretation of the observations is that the $\gamma$-rays arose from internal shocks but the optical flash resulted from external shock emission. This would have been consistent with the few seconds delay observed between the optical and $\gamma$-rays signals.

---

Bibtex entry for this abstract Preferred format for this abstract (see Preferences)