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A NEW LUMINOSITY RELATION FOR GAMMA-RAY BURSTS AND ITS IMPLICATION
Qi, Shi1,2; Lu, Tan1,2
2010-07-10
Source PublicationASTROPHYSICAL JOURNAL
Volume717Issue:2Pages:1274-1278
AbstractGamma-ray bursts (GRBs) are the most luminous astrophysical events observed so far. They are conventionally classified into long and short ones depending on their time duration, T(90). Because of the advantage that their high redshifts offer, many efforts have been made to apply GRBs to cosmology. The key to this is to find correlations between some measurable properties of GRBs and the energy or the luminosity of GRBs. These correlations are usually referred to as luminosity relations and are helpful in understanding the GRBs themselves. In this paper, we explored such correlations in the X-ray emission of GRBs. The X-ray emission of GRBs observed by Swift has the exponential functional form in the prompt phase and relaxes to a power-law decay at time T(p). We have assumed a linear relation between logL(X,p) (with L(X,p) being the X-ray luminosity at T(p)) and log[T(p)/(1 + z)], but there is some evidence for curvature in the data and the true relationship between L(X,p) and T(p)/(1 + z) may be a broken power law. The limited GRB sample used in our analysis is still not sufficient for us to conclude whether the break is real or just an illusion caused by outliers. We considered both cases in our analysis and discussed the implications of the luminosity relation, especially on the time duration of GRBs and their classification.
KeywordGamma-ray Burst: General
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/0004-637X/717/2/1274
WOS KeywordDARK ENERGY ; COSMOLOGICAL PARAMETERS ; STANDARD CANDLES ; HUBBLE DIAGRAM ; REDSHIFT ; SUPERNOVAE ; EVOLUTION ; RULERS ; SWIFT ; MODEL
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000280650800053
Citation statistics
Cited Times:12[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/10967
Collection院士文集_陆埮
Affiliation1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
2.Nanjing Univ, Purple Mt Observ, Joint Ctr Particle Nucl Phys & Cosmol, Nanjing 210093, Peoples R China
Recommended Citation
GB/T 7714
Qi, Shi,Lu, Tan. A NEW LUMINOSITY RELATION FOR GAMMA-RAY BURSTS AND ITS IMPLICATION[J]. ASTROPHYSICAL JOURNAL,2010,717(2):1274-1278.
APA Qi, Shi,&Lu, Tan.(2010).A NEW LUMINOSITY RELATION FOR GAMMA-RAY BURSTS AND ITS IMPLICATION.ASTROPHYSICAL JOURNAL,717(2),1274-1278.
MLA Qi, Shi,et al."A NEW LUMINOSITY RELATION FOR GAMMA-RAY BURSTS AND ITS IMPLICATION".ASTROPHYSICAL JOURNAL 717.2(2010):1274-1278.
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