Characteristics of Long Gamma-Ray Bursts in the Comoving Frame

doi:10.3847/1538-4357/ab16f3

	Characteristics of Long Gamma-Ray Bursts in the Comoving Frame
	Xue, Liang 1; Zhang, Fu-Wen 1,2; Zhu, Si-Yuan 1
刊名	ASTROPHYSICAL JOURNAL
	2019-05-01
卷号	876 期号:1 页码:28
关键词	gamma-ray burst: general methods: data analysis
ISSN号	0004-637X
DOI	10.3847/1538-4357/ab16f3
通讯作者	Zhang, Fu-Wen(fwzhang@pmo.ac.cn)
英文摘要	We 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.
WOS关键词	LORENTZ FACTOR ; PEAK ENERGY ; EVOLUTION ; AFTERGLOW ; EMISSION ; SPECTRA ; IDENTIFICATION ; DEPENDENCE ; ENERGETICS ; PROMPT
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000467272900001
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/24693]
专题	中国科学院紫金山天文台
通讯作者	Zhang, Fu-Wen
作者单位	1.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
推荐引用方式 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.