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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.
发表期刊ASTROPHYSICAL JOURNAL
2007-07-10
卷号663期号:2页码:1110-1117
DOI10.1086/518732
产权排序第2完成单位
收录类别SCI
关键词Gamma Rays : Bursts Gamma Rays : Theory Relativity
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.
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-637X
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WOS记录号WOS:000248001500033
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]BATSE OBSERVATIONS ; RELATIVISTIC MOTION ; LIGHT CURVES ; PULSE-WIDTH ; CATALOG ; BRIGHT ; ENERGY ; EMISSION ; SPECTROSCOPY ; INTENSITY
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/7022
专题星系研究组
通讯作者Lu, RJ (reprint author), Guangxi Univ, Phys Sci & Technol Coll, Nanning 530004, Peoples R China.
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
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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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