Greiner 2010 暗暴的来源

主要内容:
可能主要来自两个方面：暴周的吸收；红移较高。
没说本征比较暗。

精彩摘抄:


文章信息:

· Find Similar Abstracts (with default settings below)

· Electronic On-line Article (HTML)

· arXiv e-print (arXiv:1011.0618)

· Table of Contents

· References in the Article

· Citations to the Article (2) (Citation History)

· Refereed Citations to the Article

· Also-Read Articles (Reads History)

·

· Translate This Page

Title:		The nature of ``dark'' gamma-ray bursts
Authors:		Greiner, J.; Krühler, T.; Klose, S.; Afonso, P.; Clemens, C.; Filgas, R.; Yoldaş, A. Küpcü; Nardini, M.; Olivares, F.; Rau, A.; Rossi, A.; Schady, P.; Updike, A.
Affiliation:		AA(Max-Planck-Inst. für extraterrestrische Physik, Giessenbachstr. 1
Publication:		DECIPHERING THE ANCIENT UNIVERSE WITH GAMMA-RAY BURSTS. AIP Conference Proceedings, Volume 1279, pp. 144-151 (2010). (AIPC Homepage)
Publication Date:		10/2010
Origin:		AIP
Keywords:		gamma-ray sources (astronomical), cosmology, photometry, X-ray spectra
PACS Keywords:		gamma-ray sources; gamma-ray bursts, Particle-theory and field-theory models of the early Universe, Photometric, polarimetric, and spectroscopic instrumentation, X-ray
Abstract Copyright:		(c) 2010: American Institute of Physics
DOI:		10.1063/1.3509253
Bibliographic Code:		2010AIPC.1279..144G

Abstract

More than 13 years after the discovery of the first afterglows, the nature of dark gamma-ray bursts (GRB) has still eluded explanation: while each long-duration GRB typically has an X-ray afterglow, optical/NIR emission is only seen for 40-60% of those. Here we use the afterglow detection statistics of the systematic follow-up observations performed with GROND since mid-2007 in order to derive the fraction of ``dark bursts''. We find that the faint optical afterglow emission of ``dark bursts'' is due to a combination of two components: (i) moderate intrinsic extinction at moderate redshifts, and (ii) about 25% of bursts at redshift >5.

---

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