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Lorentz factor - Beaming corrected energy/luminosity correlations and GRB central engine models
Yi, Shuang-Xi1,2,3; Lei, Wei-Hua4; Zhang, Bing3; Dai, Zi-Gao2; Wu, Xue-Feng5; Liang, En-Wei6,7
2017-03-01
Source PublicationJOURNAL OF HIGH ENERGY ASTROPHYSICS
ISSN2214-4048
Volume13-14Pages:1-9
Corresponding AuthorYi, Shuang-Xi(yishuangxi@nju.edu.cn) ; Lei, Wei-Hua(leiwh@hust.edu.cn)
AbstractWe 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.
KeywordGamma-rays Bursts Accretion disks Black holes Magnetic fields
DOI10.1016/j.jheap.2017.01.001
WOS KeywordGAMMA-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
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000413200700001
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/22809
Collection中国科学院紫金山天文台
Corresponding AuthorYi, Shuang-Xi; Lei, Wei-Hua
Affiliation1.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
Recommended Citation
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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