Deviation of light curves of gamma-ray burst pulses from standard forms due to the curvature effect of spherical fireballs or uniform

	Deviation of light curves of gamma-ray burst pulses from standard forms due to the curvature effect of spherical fireballs or uniform
	Tan YP(覃一平)1,2 ; Lu RJ(陆睿静)1,2,3
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2005-09-21
卷号	362 期号:3 页码:1085-1098
关键词	relativity gamma-rays : bursts gamma-rays : theory
ISSN号	0035-8711
通讯作者	Qin, YP (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China.
产权排序	第一完成单位
英文摘要	As revealed previously, under the assumption that some pulses of gamma-ray bursts are produced by shocks in spherical fireballs or uniform jets of large opening angles, there exists a standard decay form of the profile of pulses arising from very narrow or suddenly dimming local (or intrinsic) pulses due to the relativistic curvature effect (the Doppler effect over the spherical shell surface). Profiles of pulses arising from other local pulses were previously found to possess a reverse S-feature deviation from the standard decay form. We show in this paper that, in addition to the standard decay form shown in Qin et al., there exists a marginal decay curve associated with a local delta function pulse with a monocolour radiation. We employ the sample of Kocevski, Ryde & Liang to check this prediction and find that the phenomenon of the reverse S-feature is common, when compared with both the standard decay form and the marginal decay curve. We accordingly propose to take the marginal decay curve (whose function is simple) as a criterion to check if an observed pulse could be taken as a candidate suffered from the curvature effect. We introduce two quantities A(1) and A(2) to describe the mentioned deviations within and beyond the full width at half-maximum position of the decay phase, respectively. The values of A(1) and A(2) of pulses of the sample are calculated, and the result suggests that for most of these pulses their corresponding local pulses might contain a long decay time relative to the time-scale of the curvature effect.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	BATSE OBSERVATIONS ; TIME PROFILES ; SPECTRA ; BRIGHT ; SPECTROSCOPY ; CATALOG ; SIGNATURES ; EVOLUTION
收录类别	SCI
原文出处	http://mnras.oxfordjournals.org/content/362/3/1085
语种	英语
WOS记录号	WOS:000232158300035
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/6988]
专题	云南天文台_星系研究组
作者单位	1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, PO Box 110, Kunming 650011, China 2.Physics Department, Guangxi University, Nanning, Guangxi 530004, China 3.The Graduate School of the Chinese Academy of Sciences
推荐引用方式 GB/T 7714	Tan YP,Lu RJ. Deviation of light curves of gamma-ray burst pulses from standard forms due to the curvature effect of spherical fireballs or uniform[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2005,362(3):1085-1098.
APA	Tan YP,&Lu RJ.(2005).Deviation of light curves of gamma-ray burst pulses from standard forms due to the curvature effect of spherical fireballs or uniform.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,362(3),1085-1098.
MLA	Tan YP,et al."Deviation of light curves of gamma-ray burst pulses from standard forms due to the curvature effect of spherical fireballs or uniform".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 362.3(2005):1085-1098.