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Distribution of spectral lags in gamma-ray bursts
Chen, L; Lou, YQ; Wu M(吴枚); Qu JL(屈进禄); Wu, M; Qu, JL; Jia, SM; Yang, XJ
2005
发表期刊ASTROPHYSICAL JOURNAL
卷号619期号:2页码:983-993
通讯作者Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China ; Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China ; Tsinghua Univ, THCA, Beijing 100084, Peoples R China ; Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA ; Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China ; Chinese Acad Sci, Inst High Energy Phys, Particle Astrophys Lab, Beijing 100039, Peoples R China
摘要Using the data acquired in the time-to-spill (TTS) mode for long gamma-ray bursts (GRBs) by the Burst and Transient Source Experiment (BATSE) on board the Compton Gamma Ray Observatory (CGRO), we have carefully measured spectral lags in time between the low (25-55 keV) and high (110-320 keV) energy bands of individual pulses contained in 64 multipeak GRBs. We find that a temporal lead by higher energy gamma-ray photons (i.e., positive lags) is the norm in this selected sample set of long GRBs. While relatively few in number, some pulses of several long GRBs do show negative lags. This distribution of spectral lags in long GRBs is in contrast to that in short GRBs. This apparent difference poses challenges to and places constraints on the physical mechanism(s) for producing long and short GRBs. The relation between the pulse peak count rates and the spectral lags is also examined. Observationally, there seems to be no clear evidence for a systematic spectral lag-luminosity connection for pulses within a given long GRB.
文章类型Article
关键词gamma rays : bursts gamma rays : observations methods : data analysis plasmas radiation mechanisms : general shock waves
学科领域Astronomy & Astrophysics
DOI10.1086/426774
研究领域[WOS]Astronomy & Astrophysics
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语种英语
WOS类目Astronomy & Astrophysics
WOS记录号WOS:000226589100027
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被引频次:34[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/238835
专题粒子天体物理中心
理论物理室
多学科研究中心
作者单位中国科学院高能物理研究所
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Chen, L,Lou, YQ,Wu M,et al. Distribution of spectral lags in gamma-ray bursts[J]. ASTROPHYSICAL JOURNAL,2005,619(2):983-993.
APA Chen, L.,Lou, YQ.,吴枚.,屈进禄.,Wu, M.,...&Yang, XJ.(2005).Distribution of spectral lags in gamma-ray bursts.ASTROPHYSICAL JOURNAL,619(2),983-993.
MLA Chen, L,et al."Distribution of spectral lags in gamma-ray bursts".ASTROPHYSICAL JOURNAL 619.2(2005):983-993.
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