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The prompt gamma-ray emissions and X-ray afterglows of gamma-ray burst jets
Liang EW(梁恩维)1,2,3; Liang, EW (reprint author), Nanjing Univ, Dept Astron, Nanjing 210093, Peoples R China.
发表期刊MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2004-02-11
卷号348期号:1页码:153-158
DOI10.1111/j.1365-2966.2004.07350.x
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
摘要The distribution of the duration of gamma-ray bursts (GRBs), and the relations of the jet opening angles (theta) to prompt gamma-ray emissions and X-ray afterglow emissions have been investigated within the framework of a relativistic beaming model for a sample including 10 GRBs. The redshifts, the temporal breaks of the optical afterglow light curves and the X-ray afterglows of these GRBs have been well measured. The results show that: (i) the distribution of the intrinsic burst durations extend over only approximately one order of magnitude, suggesting that these bursts tend to have a similar burst duration; (ii) the gamma-ray fluence in the comoving frame (S(gamma)) as a function of is roughly fitted by a broken power law with indices of -0.4 and -3.79 before and after a break at theta = 0.1 rad, respectively, while the X-ray fluxes decay with following a single power law with an index of -1.8; (iii) the relation between the ratio of F(x)/S(gamma) and theta follows a turnover power law with indices of -3.2 and 2.9 before and after the break at = 0.1, respectively; and (iv) the temporal indices of X-ray afterglows are significantly anticorrelated with with a Spearman rank linear correlation coefficient of r = -0.84 and a probability of chance occurrence of p = 0.004. These results are consistent with the expectations of the beaming model. They have been interpreted using both the areas of emission regions that instruments can observe and the number of baryons contained in the jets.
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0035-8711
URL查看原文
归档日期2004-08-11
WOS记录号WOS:000188646100018
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]ENERGY RESERVOIR ; LIGHT CURVES ; GRB 990123 ; DISCOVERY ; CONNECTION ; GRB-020405 ; GRB-990510 ; ENERGETICS ; MODEL
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被引频次:5[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/6981
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.Astronomy Department, Nanjing University, Nanjing 210093, China
2.Physics Department, Guangxi University, Nanning 530004, China
3.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, China
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Liang EW,Liang, EW . The prompt gamma-ray emissions and X-ray afterglows of gamma-ray burst jets[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2004,348(1):153-158.
APA Liang EW,&Liang, EW .(2004).The prompt gamma-ray emissions and X-ray afterglows of gamma-ray burst jets.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,348(1),153-158.
MLA Liang EW,et al."The prompt gamma-ray emissions and X-ray afterglows of gamma-ray burst jets".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 348.1(2004):153-158.
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