Xue 2008 prompt GeV from neutron component

主要内容:


精彩摘抄:


文章信息:

· Find Similar Abstracts (with default settings below)

· Electronic Refereed Journal Article (HTML)

· Full Refereed Journal Article (PDF/Postscript)

· arXiv e-print (arXiv:0810.3130)

· References in the article

· Also-Read Articles (Reads History)

·

· Translate This Page

Title:		GeV emission from neutron-rich internal shocks of some long γ-ray bursts
Authors:		Xue, Rong-Rong; Fan, Yi-Zhong; Wei, Da-Ming
Affiliation:		AA(Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, China; Graduate School, Chinese Academy of Sciences, Beijing 100039, China), AB(Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, China; Niels Bohr Institute, Niels Bohr International Academy, Blegdamsvej 17, DK-2100 Copenhagen, Denmark), AC(Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, China; Joint Center for Particle Nuclear Physics and Cosmology of Purple Mountain Observatory - Nanjing University, Nanjing 210008, China)
Publication:		Monthly Notices of the Royal Astronomical Society, Volume 389, Issue 1, pp. 321-324. (MNRAS Homepage)
Publication Date:		09/2008
Origin:		MNRAS
MNRAS Keywords:		radiation mechanisms: non-thermal , ISM: jets and outflows , gamma rays: bursts
Abstract Copyright:		(c) Journal compilation © 2008 RAS
DOI:		10.1111/j.1365-2966.2008.13578.x
Bibliographic Code:		2008MNRAS.389..321X

Abstract

In the neutron-rich internal shocks model for γ-ray bursts (GRBs), the Lorentz factors (LFs) of ion shells are variable, and so are the LFs of accompanying neutron shells. For slow neutron shells with a typical LF of approximate tens, the typical β-decay radius is ~10¹⁴-10¹⁵ cm. As GRBs last long enough [T₉₀ > 14(1 + z) s], one earlier but slower ejected neutron shell will be swept successively by later ejected ion shells in the range ~10¹³-10¹⁵ cm, where slow neutrons have decayed significantly. Part of the thermal energy released in the interaction will be given to the electrons. These accelerated electrons will mainly be cooled by the prompt soft γ-rays and give rise to GeV emission. This kind of GeV emission is particularly important for some very long GRBs and is detectable for the upcoming satellite Gamma-Ray Large Area Space Telescope (GLAST).

---

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