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题名: A NEW LUMINOSITY RELATION FOR GAMMA-RAY BURSTS AND ITS IMPLICATION
作者: Qi Shi(祈石)1, 2; Lu Tan(陆埮)1, 2
刊名: ASTROPHYSICAL JOURNAL
出版日期: 2010-07-10
卷号: 717, 期号:2, 页码:1274-1278
关键词: gamma-ray burst: general
学科分类: Astronomy & Astrophysics
DOI: 10.1088/0004-637X/717/2/1274
文章类型: Article
英文摘要: Gamma-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.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: DARK ENERGY ; COSMOLOGICAL PARAMETERS ; STANDARD CANDLES ; HUBBLE DIAGRAM ; REDSHIFT ; SUPERNOVAE ; EVOLUTION ; RULERS ; SWIFT ; MODEL
收录类别: SCI
语种: 英语
WOS记录号: WOS:000280650800053
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/10967
Appears in Collections:陆埮_期刊论文

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作者单位: 1.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:
祁 石、陆 埮.A new luminosity relation for gamma-ray bursts and its implication,Astrophysical Journal,2010,717(1274-1278):
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