A NEW LUMINOSITY RELATION FOR GAMMA-RAY BURSTS AND ITS IMPLICATION

	A NEW LUMINOSITY RELATION FOR GAMMA-RAY BURSTS AND ITS IMPLICATION
	Qi, Shi1,2 ; Lu, Tan1,2
刊名	ASTROPHYSICAL JOURNAL
	2010-07-10
卷号	717 期号:2 页码:1274-1278
关键词	gamma-ray burst: general
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.
学科主题	Astronomy & Astrophysics
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
公开日期	2015-04-14
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/10967]
专题	紫金山天文台_院士文集_陆埮
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
推荐引用方式 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.