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The peak energy distribution of the nu F(nu) spectra and the implications for the jet structure models of gamma-ray bursts
Liang EW(梁恩维)1,2,3; Dai, ZG1; Liang, EW (reprint author), Nanjing Univ, Dept Astron, Nanjing 210093, Peoples R China.
发表期刊ASTROPHYSICAL JOURNAL
2004-06-10
卷号608期号:1页码:L9-L12
DOI10.1086/422253
产权排序第3完成单位
收录类别SCI
关键词Gamma Rays : Bursts Gamma Rays : Observations Ism : Jets And Outflows Methods : Statistical
摘要We study the peak energy (E(p)) distribution of the nuF(nu) spectra of gamma-ray bursts (GRBs) and X-ray flashes (XRFs) with a sample of 57 bursts observed by High Energy Transient Explorer (HETE-2) French Gamma Telescope and discuss its implications for the jet structure models. Combining the observed E(p) distribution of HETE-2 GRBs/XRFs with that of BATSE GRBs, we find that the observed E(p) distribution of GRBs/XRFs is a bimodal one with peaks of less than or similar to30 keV and similar to160-250 keV. According to the recently discovered equivalent-isotropic energy-E(p) relationship, such a bimodal distribution implies a two-component structure of GRB/XRF jets. A simple simulation analysis shows that this structured jet model does roughly reproduce a bimodal distribution with peaks of similar to15 and similar to200 keV. We argue that future observations of the peak of similar to15 keV in the E(p) distribution would be evidence supporting this model. Swift, which covers an energy band of 0.2-150 keV, is expected to provide a key test for our results.
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-637X
URL查看原文
归档日期2004-08-11
WOS记录号WOS:000221881600003
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]AFTERGLOW LIGHT CURVES ; 2-COMPONENT JET ; VIEWING ANGLE ; RESERVOIR ; DIVERSITY ; FLASHES
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/6976
专题星系研究组
通讯作者Liang, EW (reprint author), Nanjing Univ, Dept Astron, Nanjing 210093, Peoples R China.
作者单位1.Department of Astronomy, Nanjing University, Nanjing 210093, China
2.Department of Physics, Guangxi University, Nanning 530004, China
3.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, China
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Liang EW,Dai, ZG,Liang, EW . The peak energy distribution of the nu F(nu) spectra and the implications for the jet structure models of gamma-ray bursts[J]. ASTROPHYSICAL JOURNAL,2004,608(1):L9-L12.
APA Liang EW,Dai, ZG,&Liang, EW .(2004).The peak energy distribution of the nu F(nu) spectra and the implications for the jet structure models of gamma-ray bursts.ASTROPHYSICAL JOURNAL,608(1),L9-L12.
MLA Liang EW,et al."The peak energy distribution of the nu F(nu) spectra and the implications for the jet structure models of gamma-ray bursts".ASTROPHYSICAL JOURNAL 608.1(2004):L9-L12.
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