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Comparison between the time-integrated spectrum and the peak time spectrum of gamma-ray bursts and possible implications
Lyu Fen1,2,3,4; Wang YuanZhu1,2; Liang YunFeng1,2,3; Lin TingTing1,2; Hu YouDong1,2; Liang EnWei1,2,4
2015-03-01
Source PublicationSCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
Volume58Issue:3Pages:39501
AbstractThe 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.
KeywordGamma-ray Sources Gamma-ray Bursts Gamma-rays: Astronomical Observations
Subject Area天文和天体物理
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1007/s11433-014-5575-1
WOS KeywordE-P RELATION ; PROMPT EMISSION ; FERMI OBSERVATIONS ; GRB 080916C ; COMPREHENSIVE ANALYSIS ; SWIFT ERA ; ENERGY ; LUMINOSITY ; MODELS ; RADIATION
Indexed BySCI
Language英语
WOS Research AreaPhysics
WOS SubjectPhysics, Multidisciplinary
WOS IDWOS:000349813600012
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/14921
Collection卫星精密定轨及应用研究团组
Affiliation1.Guangxi Univ, Dept Phys, Nanning 530004, Peoples R China
2.Guangxi Univ, GXU NAOC Ctr Astrophys & Space Sci, Nanning 530004, Peoples R China
3.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
4.Chinese Acad Sci, Key Lab Struct & Evolut Celestial Objects, Kunming 650011, Peoples R 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):39501.
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),39501.
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):39501.
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