Lorentz factor - Beaming corrected energy/luminosity correlations and GRB central engine models

doi:10.1016/j.jheap.2017.01.001

	Lorentz factor - Beaming corrected energy/luminosity correlations and GRB central engine models
	Yi, Shuang-Xi 1,2,3; Lei, Wei-Hua 4; Zhang, Bing 3; Dai, Zi-Gao 2; Wu, Xue-Feng5 ; Liang, En-Wei 6,7
刊名	JOURNAL OF HIGH ENERGY ASTROPHYSICS
	2017-03-01
卷号	13-14 页码:1-9
关键词	Gamma-rays Bursts Accretion disks Black holes Magnetic fields
ISSN号	2214-4048
DOI	10.1016/j.jheap.2017.01.001
通讯作者	Yi, Shuang-Xi(yishuangxi@nju.edu.cn) ; Lei, Wei-Hua(leiwh@hust.edu.cn)
英文摘要	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.
WOS关键词	GAMMA-RAY BURSTS ; COOLED ACCRETION DISKS ; BLANDFORD-ZNAJEK PROCESS ; MAGNETAR CENTRAL ENGINES ; COMPACT OBJECT MERGERS ; AFTERGLOW LIGHT CURVES ; 23 JANUARY 1999 ; SWIFT XRT DATA ; X-RAY ; BLACK-HOLES
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000413200700001
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/22808]
专题	中国科学院紫金山天文台
通讯作者	Yi, Shuang-Xi; Lei, Wei-Hua
作者单位	1.Qufu Normal Univ, Coll Phys & Engn, Qufu 273165, Peoples R China 2.Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Jiangsu, Peoples R China 3.Univ Nevada, Dept Phys & Astron, Las Vegas, NV 89154 USA 4.Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Hubei, Peoples R China 5.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China 6.Guangxi Univ, Dept Phys, GXU NAOC Ctr Astrophys & Space Sci, Nanning 530004, Peoples R China 7.Guangxi Key Lab Relativist Astrophys, Nanning 530004, Peoples R China
推荐引用方式 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.