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Spectral hardness evolution of gamma-ray bursts due to the Doppler effect of fireballs
Lu, RJ1; Peng CY(彭朝阳)2,3; Dong, W1; Lu, RJ (reprint author), Guangxi Univ, Phys Sci & Technol Coll, Nanning 530004, Peoples R China.
Source PublicationASTROPHYSICAL JOURNAL
2007-07-10
Volume663Issue:2Pages:1110-1117
DOI10.1086/518732
Contribution Rank第2完成单位
Indexed BySCI
KeywordGamma Rays : Bursts Gamma Rays : Theory Relativity
AbstractWe 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.
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0004-637X
URL查看原文
WOS IDWOS:000248001500033
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordBATSE OBSERVATIONS ; RELATIVISTIC MOTION ; LIGHT CURVES ; PULSE-WIDTH ; CATALOG ; BRIGHT ; ENERGY ; EMISSION ; SPECTROSCOPY ; INTENSITY
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Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/7022
Collection星系研究组
Corresponding AuthorLu, RJ (reprint author), Guangxi Univ, Phys Sci & Technol Coll, Nanning 530004, Peoples R China.
Affiliation1.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
Recommended Citation
GB/T 7714
Lu, RJ,Peng CY,Dong, W,et al. 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,&Lu, RJ .(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.
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