Spectral cutoffs of Fermi-LAT GRBs 080916C and 090926A
Li, Biao1; Li, Zhuo1,2; Li, BA (reprint author), Peking Univ, Kavli Inst Astron & Astrophys, Dept Astron, Beijing 100871, Peoples R China.
发表期刊RESEARCH IN ASTRONOMY AND ASTROPHYSICS
2012-11
卷号12期号:11页码:1519-1525
DOI10.1088/1674-4527/12/11/006
收录类别SCI
关键词Gamma-rays: Bursts Acceleration Of Particles
摘要It is expected that there should be a spectral cutoff at the high energy end of emission from a prompt gamma-ray burst (GRB), due to, e.g. gamma gamma absorption and/or a high energy cutoff in the electron distribution. We analyze the spectral data of Fermi-LAT detected GRBs 080916C and 090926A, aiming at locating the spectral cutoff. By assuming that the prompt GRB spectrum at the high energy end is a power law with an exponential cutoff, our analysis finds that the cutoff energy E-cutoff depends on the photon index beta and the cutoff occurs at very high energy, E-cutoff = 161(-95)(+533) GeV in GRB 080916C and E-cutoff greater than or similar to 100 GeV (for beta approximate to -2.3) in GRB 090926A. Such high energy photons, if they exist, may disfavor the synchrotron origin and need alternative generation mechanisms.
项目资助者Open Research Program of the Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN1674-4527
URL查看原文
WOS记录号WOS:000311523700006
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]GAMMA-RAY BURSTS ; LORENTZ FACTORS ; GEV EMISSION ; RESIDUAL COLLISIONS ; PROMPT ; RADIATION ; AFTERGLOW ; OUTFLOWS ; LIMITS ; BATSE
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/9428
专题中国科学院天体结构与演化重点实验室
通讯作者Li, BA (reprint author), Peking Univ, Kavli Inst Astron & Astrophys, Dept Astron, Beijing 100871, Peoples R China.
作者单位1.Department of Astronomy/Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871, China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China
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Li, Biao,Li, Zhuo,Li, BA . Spectral cutoffs of Fermi-LAT GRBs 080916C and 090926A[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2012,12(11):1519-1525.
APA Li, Biao,Li, Zhuo,&Li, BA .(2012).Spectral cutoffs of Fermi-LAT GRBs 080916C and 090926A.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,12(11),1519-1525.
MLA Li, Biao,et al."Spectral cutoffs of Fermi-LAT GRBs 080916C and 090926A".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 12.11(2012):1519-1525.
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