Spectral hardness evolution of gamma-ray bursts due to the Doppler effect of fireballs

	Spectral hardness evolution of gamma-ray bursts due to the Doppler effect of fireballs
	Lu, RJ1 ; Peng CY(彭朝阳)2,3 ; Dong, W 1
刊名	ASTROPHYSICAL JOURNAL
	2007-07-10
卷号	663 期号:2 页码:1110-1117
关键词	gamma rays : bursts gamma rays : theory relativity
ISSN号	0004-637X
通讯作者	Lu, RJ (reprint author), Guangxi Univ, Phys Sci & Technol Coll, Nanning 530004, Peoples R China.
产权排序	第二完成单位
英文摘要	We have investigated the evolution of observed spectral hardness E-p ( where E-p is the maximum of the nu F-nu spectrum) based on the model of highly symmetric expanding fireballs, where the Doppler effect of the expanding fireball surface is the key factor concerned, and find that the evolutionary curve of E-p undergoes a drop to rise to decay evolution ( the A, B, and C phases, respectively). The A phase peaks at the very onset of the corresponding light-curve pulse. Since the Doppler effect is less prominent in the B phase, corresponding to the rising portion of the pulse, the slope of the B phase reflects both the corresponding intrinsic spectral evolution and the shape of its local pulse. The C phase, corresponding to the decay portion of the pulse, where the Doppler effect dominates, always decreases monotonically and does not necessarily reflect the corresponding intrinsic spectral evolution. Investigation of a sample of 12 FRED pulses ( their peak energy can be found in the work of Kaneko et al.) shows that the evolutionary characteristics of the fitted peak energy in the FRED pulses are in good agreement with our predictions.
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 ; RELATIVISTIC MOTION ; LIGHT CURVES ; PULSE-WIDTH ; CATALOG ; BRIGHT ; ENERGY ; EMISSION ; SPECTROSCOPY ; INTENSITY
收录类别	SCI
原文出处	http://iopscience.iop.org/0004-637X/663/2/1110/
语种	英语
WOS记录号	WOS:000248001500033
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/7022]
专题	云南天文台_星系研究组
作者单位	1.Physical Science and Technology College, Guangxi University, Nanning, Guangxi 530004, China 2.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, P.O. Box 110, Kunming, Yunnan, 650011, China 3.The Graduate School of the Chinese Academy of Sciences, Beijing 100049, China
推荐引用方式 GB/T 7714	Lu, RJ,Peng CY,Dong, W. Spectral hardness evolution of gamma-ray bursts due to the Doppler effect of fireballs[J]. ASTROPHYSICAL JOURNAL,2007,663(2):1110-1117.
APA	Lu, RJ,Peng CY,&Dong, W.(2007).Spectral hardness evolution of gamma-ray bursts due to the Doppler effect of fireballs.ASTROPHYSICAL JOURNAL,663(2),1110-1117.
MLA	Lu, RJ,et al."Spectral hardness evolution of gamma-ray bursts due to the Doppler effect of fireballs".ASTROPHYSICAL JOURNAL 663.2(2007):1110-1117.