Relationship between the gamma-ray burst pulse width and energy due to the doppler effect of fireballs

	Relationship between the gamma-ray burst pulse width and energy due to the doppler effect of fireballs
	Tan YP(覃一平)1,2 ; Dong YM(董云明)1,3 ; Lu RJ(陆睿静)1,2,3 ; Zhang BB(张彬彬)1,3 ; Jia LW(贾兰伟)1,3
刊名	ASTROPHYSICAL JOURNAL
	2005-10-20
卷号	632 期号:2 页码:1008-1020
关键词	gamma rays : bursts gamma rays : theory relativity
ISSN号	0004-637X
通讯作者	Qin, YP (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Yunnan, Peoples R China.
产权排序	第一完成单位
英文摘要	We study in detail how the pulse width of gamma-ray bursts is related to energy under the assumption that the sources concerned are in the fireball stage. Due to the Doppler effect of fireballs, there exists a power-law relationship between the two quantities within a limited range of frequency. The power-law range and power-law index depend strongly on the observed peak energy E-p as well as the rest-frame radiation form, and the upper and lower limits of the power-law range can be determined by Ep. It is found that within the same power-law range, the ratio of the FWHM of the rising portion to that of the decaying phase of the pulses is also related to energy in the form of power laws. A plateau/power law/plateau feature is observed in the two relationships. In the case of an obvious softening of the rest-frame spectrum, the two power-law relationships also exist, but the feature evolves to a peaked one. Predictions of the relationships in the energy range covering both the BATSE and Swift bands for a typical hard burst and a typical soft one are made. A sample of FRED (fast rise and exponential decay) pulse bursts shows that 27 out of the 28 sources belong to either the plateau/power law/ plateau feature class or to the peaked feature group, suggesting that the effect concerned is indeed important for most of the sources of the sample. Among these bursts, many might undergo an obvious softening evolution of the rest- frame spectrum.
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]	RELATIVISTIC MOTION ; SPECTRAL FEATURES ; TIME PROFILES ; BATSE ; CATALOG ; BRIGHT ; PEAK ; VARIABILITY ; BEPPOSAX ; LOCALIZATION
收录类别	SCI
原文出处	http://iopscience.iop.org/0004-637X/632/2/1008/
语种	英语
WOS记录号	WOS:000232569100030
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/6987]
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, P.O. Box 110, Kunming, Yunnan 650011, China 2.Physics Department, Guangxi University, Nanning, Guangxi 530004, China 3.Graduate School of the Chinese Academy of Sciences, P.O. Box 3908, Beijing 100039, China
推荐引用方式 GB/T 7714	Tan YP,Dong YM,Lu RJ,et al. Relationship between the gamma-ray burst pulse width and energy due to the doppler effect of fireballs[J]. ASTROPHYSICAL JOURNAL,2005,632(2):1008-1020.
APA	Tan YP,Dong YM,Lu RJ,Zhang BB,&Jia LW.(2005).Relationship between the gamma-ray burst pulse width and energy due to the doppler effect of fireballs.ASTROPHYSICAL JOURNAL,632(2),1008-1020.
MLA	Tan YP,et al."Relationship between the gamma-ray burst pulse width and energy due to the doppler effect of fireballs".ASTROPHYSICAL JOURNAL 632.2(2005):1008-1020.