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Characteristics of Long Gamma-Ray Bursts in the Comoving Frame
Xue, Liang1; Zhang, Fu-Wen1,2; Zhu, Si-Yuan1
2019-05-01
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume876Issue:1Pages:28
Corresponding AuthorZhang, Fu-Wen(fwzhang@pmo.ac.cn)
AbstractWe compile a sample of 93 long gamma-ray bursts (GRBs) from the Fermi satellite and 131 from Konus-Wind that have measured redshifts and well-determined spectra, and estimate their pseudo-Lorentz factors (Gamma(0)) using the tight L-iso-E-p-Gamma(0) correlation. The statistical properties and pair correlations of the temporal and spectral parameters are studied in the observer frame, rest frame, and comoving frame, respectively. We find that the distributions of the duration, peak energy, isotropic energy, and luminosity in the different frames are basically log-normal, and that their distributions in the comoving frame are narrow, clustering around T'(90) similar to 4000 s, E'(p,c) similar to 0.7 keV, E'(iso,c) similar to 8 x 10(49) erg, and L'(iso,c) similar to 2.5 x 10(46) erg s(-1), where the redshift evolution effect has been taken into account. We also find that the values of Gamma(0) are broadly distributed between a few tens and several hundreds, with median values of similar to 270. We further analyze the pair correlations of all the quantities, confirm the E-iso-E-p, L-iso-E-p, L-iso-Gamma(0), and E-iso-Gamma(0) relations, and find that the corresponding relations in the comoving frame do still exist, but with large dispersions. This suggests not only that the well-known spectrum-energy relations are intrinsic correlations, but also that the observed correlations are governed by the Doppler effect. In addition, the peak energies of long GRBs are independent of duration both in the rest frame and in the comoving frame, and there is a weak anticorrelation between the peak energy and Lorentz factor.
Keywordgamma-ray burst: general methods: data analysis
DOI10.3847/1538-4357/ab16f3
WOS KeywordLORENTZ FACTOR ; PEAK ENERGY ; EVOLUTION ; AFTERGLOW ; EMISSION ; SPECTRA ; IDENTIFICATION ; DEPENDENCE ; ENERGETICS ; PROMPT
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000467272900001
PublisherIOP PUBLISHING LTD
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/24694
Collection中国科学院紫金山天文台
Corresponding AuthorZhang, Fu-Wen
Affiliation1.Guilin Univ Technol, Coll Sci, Guilin 541004, Peoples R China
2.Chinese Acad Sci, Key Lab Dark Matter & Space Astron, Nanjing 210008, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Xue, Liang,Zhang, Fu-Wen,Zhu, Si-Yuan. Characteristics of Long Gamma-Ray Bursts in the Comoving Frame[J]. ASTROPHYSICAL JOURNAL,2019,876(1):28.
APA Xue, Liang,Zhang, Fu-Wen,&Zhu, Si-Yuan.(2019).Characteristics of Long Gamma-Ray Bursts in the Comoving Frame.ASTROPHYSICAL JOURNAL,876(1),28.
MLA Xue, Liang,et al."Characteristics of Long Gamma-Ray Bursts in the Comoving Frame".ASTROPHYSICAL JOURNAL 876.1(2019):28.
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