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Comparison between the time-integrated spectrum and the peak time spectrum of gamma-ray bursts and possible implications
Lyu Fen1,2,3; Wang YuanZhu1; Liang YunFeng1,2; Lin TingTing1; Hu YouDong1; Liang EnWei1,3
Source PublicationSCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
2015-03
Volume58Issue:3
DOI10.1007/s11433-014-5575-1
Indexed BySCI
KeywordGamma-ray Sources Gamma-ray Bursts Gamma-rays: Astronomical Observations
Abstract

The mono-frequency peak luminosity and the corresponding photon energy of the time-integrated (L-p(s), E-p(s)) and peak time (L-p(t), E-p(t)) nu f(nu) spectra were derived for a sample of 38 redshift-known Fermi GRBs by fitting the spectra with the Band function. It was found that E-p(t) is generally consistent with E-p(s), and L-p(t) is averagely three times larger than L-p(s). The slope of the L-p(t) - E-p(t), relation was consistent with that of the L-p(s) - E-p(s) relation. The photon indices in the peak time spectrum, particularly, the index of the low energy end was, were statistically larger than that in the time-integrated spectrum. These results indicate that L-p(s) and E-p(s) are dominated by L-p(t) and E-p(t) respectively. The difference of the spectral indices between the time-integrated and peak time spectra may be because of the overlap effect of a series of time-resolved spectra within a GRB. Our simulations, which were based on the observed spectral evolution and correlation between the energy flux and the peak energy within individual GRBs support our speculations. The L-p(t) - E-p(t) relation may be less contaminated by the overlap effect, and it would may be an intrinsic feature of radiation physics.

Funding ProjectNational Basic Research Program of China[2014CB845800] ; National Natural Science Foundation of China[11025313] ; Guangxi Science Foundation[2013GXNSFFA019001] ; Key Laboratory for the Structure and Evolution of Celestial Objects of Chinese Academy of Sciences ; Strategic Priority Research Program "The Emergence of Cosmological Structures" of the Chinese Academy of Sciences[XDB09000000]
Funding OrganizationNational Basic Research Program of China[2014CB845800] ; National Natural Science Foundation of China[11025313] ; Guangxi Science Foundation[2013GXNSFFA019001] ; Key Laboratory for the Structure and Evolution of Celestial Objects of Chinese Academy of Sciences ; Strategic Priority Research Program "The Emergence of Cosmological Structures" of the Chinese Academy of Sciences[XDB09000000]
Language英语
Subject Area物理学 ; 天文学 ; 天体物理学 ; 高能天体物理学
MOST Discipline Catalogue理学 ; 理学::物理学 ; 理学::天文学
SubtypeArticle
PublisherSCIENCE PRESS
Publication Place16 DONGHUANGCHENGGEN NORTH ST, BEIJING 100717, PEOPLES R CHINA
ISSN1674-7348
URL查看原文
WOS IDWOS:000349813600012
WOS Research AreaPhysics
WOS SubjectPhysics, Multidisciplinary
WOS KeywordE-P RELATION ; PROMPT EMISSION ; FERMI OBSERVATIONS ; GRB 080916C ; COMPREHENSIVE ANALYSIS ; SWIFT ERA ; ENERGY ; LUMINOSITY ; MODELS ; RADIATION
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/9375
Collection中国科学院天体结构与演化重点实验室
Corresponding AuthorLiang EnWei
Affiliation1.Department of Physics and GXU-NAOC Center for Astrophysics and Space Sciences, Guangxi University, Nanning, 530004, China
2.Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, 210008, China
3.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming, 650011, China
Recommended Citation
GB/T 7714
Lyu Fen,Wang YuanZhu,Liang YunFeng,et al. Comparison between the time-integrated spectrum and the peak time spectrum of gamma-ray bursts and possible implications[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2015,58(3).
APA Lyu Fen,Wang YuanZhu,Liang YunFeng,Lin TingTing,Hu YouDong,&Liang EnWei.(2015).Comparison between the time-integrated spectrum and the peak time spectrum of gamma-ray bursts and possible implications.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,58(3).
MLA Lyu Fen,et al."Comparison between the time-integrated spectrum and the peak time spectrum of gamma-ray bursts and possible implications".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 58.3(2015).
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