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MODELING THE MULTI-BAND AFTERGLOW OF GRB 091127: EVIDENCE OF A HARD ELECTRON ENERGY SPECTRUM WITH AN INJECTION BREAK
Zhang, Q; Huang, YF; Zong, HS; Zhang, Q (reprint author), Nanjing Univ, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China.
2015
发表期刊ASTROPHYSICAL JOURNAL
卷号811期号:2页码:83
文章类型Article
摘要The afterglows of gamma-ray bursts (GRBs) are believed to originate from the synchrotron emission of shock-accelerated electrons produced by the interaction between the outflow and the external medium. The accelerated electrons are usually assumed to follow a power-law energy distribution with an index of p. Observationally, although most GRB afterglows have a p larger than 2, there are still a few GRBs suggestive of a hard (p < 2) electron spectrum. The well-sampled broad-band afterglow data for GRB 091127 show evidence of a hard electron spectrum and strong spectral evolution, with a spectral break moving from high to lower energies. The spectral break evolves very fast and cannot be explained by the cooling break in the standard afterglow model, unless evolving microphysical parameters are assumed. In addition, the multi-band afterglow light curves show an achromatic break at around 33 ks. Based on the model of a hard electron spectrum with an injection break, we interpret the observed spectral break as the synchrotron frequency corresponding to the injection break, and the achromatic break as a jet break caused by the jet-edge effect. It is shown that the spectral evolution and the multi-band afterglow light curves of GRB 091127 can be well reproduced by this model.
关键词Acceleration Of Particles Gamma-ray Burst: Individual (Grb 091127) Ism: Jets And Outflows
学科领域Astronomy & Astrophysics
资助者National Basic Research Program of China [2014CB845800] ; National Basic Research Program of China [2014CB845800] ; National Basic Research Program of China [2014CB845800] ; National Basic Research Program of China [2014CB845800] ; National Natural Science Foundation of China [11473012, 11475085, 11275097] ; National Natural Science Foundation of China [11473012, 11475085, 11275097] ; National Natural Science Foundation of China [11473012, 11475085, 11275097] ; National Natural Science Foundation of China [11473012, 11475085, 11275097] ; National Basic Research Program of China [2014CB845800] ; National Basic Research Program of China [2014CB845800] ; National Basic Research Program of China [2014CB845800] ; National Basic Research Program of China [2014CB845800] ; National Natural Science Foundation of China [11473012, 11475085, 11275097] ; National Natural Science Foundation of China [11473012, 11475085, 11275097] ; National Natural Science Foundation of China [11473012, 11475085, 11275097] ; National Natural Science Foundation of China [11473012, 11475085, 11275097]
DOIhttp://dx.doi.org/10.1088/0004-637X/811/2/83
关键词[WOS]GAMMA-RAY BURST ; RELATIVISTIC COLLISIONLESS SHOCKS ; LIGHT CURVES ; PARTICLE-ACCELERATION ; BROAD-BAND ; ULTRARELATIVISTIC SHOCKS ; THEORETICAL IMPLICATIONS ; PHYSICAL PARAMETERS ; OPTICAL AFTERGLOW ; MAGNETIC-FIELDS
收录类别SCI
语种英语
资助者National Basic Research Program of China [2014CB845800] ; National Basic Research Program of China [2014CB845800] ; National Basic Research Program of China [2014CB845800] ; National Basic Research Program of China [2014CB845800] ; National Natural Science Foundation of China [11473012, 11475085, 11275097] ; National Natural Science Foundation of China [11473012, 11475085, 11275097] ; National Natural Science Foundation of China [11473012, 11475085, 11275097] ; National Natural Science Foundation of China [11473012, 11475085, 11275097] ; National Basic Research Program of China [2014CB845800] ; National Basic Research Program of China [2014CB845800] ; National Basic Research Program of China [2014CB845800] ; National Basic Research Program of China [2014CB845800] ; National Natural Science Foundation of China [11473012, 11475085, 11275097] ; National Natural Science Foundation of China [11473012, 11475085, 11275097] ; National Natural Science Foundation of China [11473012, 11475085, 11275097] ; National Natural Science Foundation of China [11473012, 11475085, 11275097]
WOS类目Astronomy & Astrophysics
引用统计
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/20846
专题理论物理所SCI论文
通讯作者Zhang, Q (reprint author), Nanjing Univ, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China.
推荐引用方式
GB/T 7714
Zhang, Q,Huang, YF,Zong, HS,et al. MODELING THE MULTI-BAND AFTERGLOW OF GRB 091127: EVIDENCE OF A HARD ELECTRON ENERGY SPECTRUM WITH AN INJECTION BREAK[J]. ASTROPHYSICAL JOURNAL,2015,811(2):83.
APA Zhang, Q,Huang, YF,Zong, HS,&Zhang, Q .(2015).MODELING THE MULTI-BAND AFTERGLOW OF GRB 091127: EVIDENCE OF A HARD ELECTRON ENERGY SPECTRUM WITH AN INJECTION BREAK.ASTROPHYSICAL JOURNAL,811(2),83.
MLA Zhang, Q,et al."MODELING THE MULTI-BAND AFTERGLOW OF GRB 091127: EVIDENCE OF A HARD ELECTRON ENERGY SPECTRUM WITH AN INJECTION BREAK".ASTROPHYSICAL JOURNAL 811.2(2015):83.
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