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Lorentz factor - Beaming corrected energy/luminosity correlations and GRB central engine models
Yi, Shuang-Xi; Lei, Wei-Hua; Zhang, Bing; Dai, Zi-Gao; Wu, Xue-Feng; Liang, En-Wei
2017
发表期刊JOURNAL OF HIGH ENERGY ASTROPHYSICS
卷号13-14页码:1-9
摘要We work on a GRB sample whose initial Lorentz factors (Gamma(0)) are constrained by the afterglow onset method and the jet opening angles (theta j) are determined by the jet break time. We confirm the Gamma(0)-E-gamma,E-iso correlation by Liang etal.(2010), and the Gamma(0)-L-gamma,L-iso correlation by Lu etal.(2012). Furthermore, we find correlations between Gamma(0) and the beaming corrected gamma-ray energy (E-gamma) and mean gamma-ray luminosity (L-gamma). By also including the kinetic energy of the afterglow, we find rough correlations (with larger scatter) between Gamma(0) and the total (gamma- ray plus kinetic) energy and the total mean luminosity, both for isotropic values and beaming corrected values: these correlations allow us to test the data with GRB central engine models. Limiting our sample to the GRBs that likely have a black hole central engine, we compare the data with theoretical predictions of two types of jet launching mechanisms from BHs, i. e. the nonmagnetized v (v) over bar -annihilation mechanism, and the strongly magnetized Blandford- Znajek (BZ) mechanism. We find that the data are more consistent with the latter mechanism, and discuss the implications of our findings for GRB jet composition. (C) 2017 Elsevier B.V. All rights reserved.
语种英语
文献类型期刊论文
条目标识符http://libir.pmo.ac.cn/handle/332002/17550
专题南极天文中心
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GB/T 7714
Yi, Shuang-Xi,Lei, Wei-Hua,Zhang, Bing,et al. Lorentz factor - Beaming corrected energy/luminosity correlations and GRB central engine models[J]. JOURNAL OF HIGH ENERGY ASTROPHYSICS,2017,13-14:1-9.
APA Yi, Shuang-Xi,Lei, Wei-Hua,Zhang, Bing,Dai, Zi-Gao,Wu, Xue-Feng,&Liang, En-Wei.(2017).Lorentz factor - Beaming corrected energy/luminosity correlations and GRB central engine models.JOURNAL OF HIGH ENERGY ASTROPHYSICS,13-14,1-9.
MLA Yi, Shuang-Xi,et al."Lorentz factor - Beaming corrected energy/luminosity correlations and GRB central engine models".JOURNAL OF HIGH ENERGY ASTROPHYSICS 13-14(2017):1-9.
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