Basak 2013 Fermi暴时间分片后的Amati关系

主要内容:


精彩摘抄:
The sample contains 19 GRBs with 43 pulses.

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:1309.5233)

· References in the article

· Also-Read Articles (Reads History)

·

· Translate This Page

Title:		Pulse-wise Amati correlation in Fermi gamma-ray bursts
Authors:		Basak, Rupal; Rao, A. R.
Affiliation:		AA(Department of Astronomy and Astrophysics, Tata Institute of Fundamental Research, Mumbai 400005, India; rupalb@tifr.res.in), AB(Department of Astronomy and Astrophysics, Tata Institute of Fundamental Research, Mumbai 400005, India)
Publication:		Monthly Notices of the Royal Astronomical Society, Volume 436, Issue 4, p.3082-3088 (MNRAS Homepage)
Publication Date:		12/2013
Origin:		OUP
Astronomy Keywords:		radiation mechanisms: non-thermal, methods: data analysis, methods: observational, methods: statistical, gamma-ray burst: general, early Universe
Abstract Copyright:		2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society
DOI:		10.1093/mnras/stt1790
Bibliographic Code:		2013MNRAS.436.3082B

Abstract

We make a detailed pulse-wise study of gamma-ray bursts (GRBs) with known redshift detected by Fermi/Gamma-Ray Burst Monitor. The sample contains 19 GRBs with 43 pulses. We find that the average peak energy is correlated to the radiated energy (the Amati relation) for individual pulses with a correlation coefficient of 0.86, which is slightly better than the correlation for the full GRBs. As the present correlation holds within GRBs, it is strong evidence supporting the reliability of such a correlation. We investigate several aspects of this correlation. (i) We divide our sample into redshift bins and study the evolution of the correlation. Though there is a marginal indication of evolution of the correlation, we can conclude that the present data are consistent with no evolution. (ii) We compare the correlation in the first or single pulses of these GRBs to that of the rest of the pulses, and confirm that the correlation is unaffected by the fact that first/single pulses are generally harder than the rest. Finally, we conclude that the pulse-wise Amati correlation is more robust and it has the potential of refining the correlation so that GRB study could be used as a cosmological tool.

---

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