Pair loading in gamma-ray burst fireballs and prompt emission from pair-rich reverse shocks
Li Z(黎卓); Li, Z; Dai, ZG; Lu, T; Song, LM; Song LM(宋黎明)
刊名ASTROPHYSICAL JOURNAL
2003
卷号599期号:1页码:380-386
关键词gamma rays : bursts radiation mechanisms : nonthermal relativity
学科分类Astronomy & Astrophysics
DOI10.1086/379231
通讯作者Nanjing Univ, Dept Astron, Nanjing 210093, Peoples R China ; Chinese Acad Sci, Inst High Energy Phys, Particle Astrophys Lab, Beijing 100039, Peoples R China
文章类型Article
英文摘要Gamma-ray bursts (GRBs) are believed to originate from ultrarelativistic winds/fireballs to avoid the "compactness problem." However, the most energetic photons in GRBs may still suffer from gamma-gamma absorption leading to e(+/-) pair production in the winds/fireballs. We show here that in a wide range of model parameters, the resulting pairs may dominate those electrons associated with baryons. Later on, the pairs would be carried into a reverse shock so that a shocked pair-rich fireball may produce a strong flash at lower frequencies, i.e., in the IR band, in contrast to optical/UV emission from a pair-poor fireball. The IR emission would show a 5/2 spectral index due to strong self-absorption. Rapid responses to GRB triggers in the IR band would detect such strong flashes. The future detections of many IR flashes will infer that the rarity of prompt optical/UV emissions is in fact due to dust obscuration in the star formation regions.
类目[WOS]Astronomy & Astrophysics
研究领域[WOS]Astronomy & Astrophysics
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语种英语
WOS记录号WOS:000187149600030
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被引频次:22[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/311005/237245
专题中国科学院高能物理研究所_粒子天体物理中心_期刊论文
作者单位中国科学院高能物理研究所
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Li Z,Li, Z,Dai, ZG,et al. Pair loading in gamma-ray burst fireballs and prompt emission from pair-rich reverse shocks[J]. ASTROPHYSICAL JOURNAL,2003,599(1):380-386.
APA 黎卓,Li, Z,Dai, ZG,Lu, T,Song, LM,&宋黎明.(2003).Pair loading in gamma-ray burst fireballs and prompt emission from pair-rich reverse shocks.ASTROPHYSICAL JOURNAL,599(1),380-386.
MLA 黎卓,et al."Pair loading in gamma-ray burst fireballs and prompt emission from pair-rich reverse shocks".ASTROPHYSICAL JOURNAL 599.1(2003):380-386.
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