Are long gamma-ray bursts standard candles?

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	Are long gamma-ray bursts standard candles?
	Lin, HN; Li, X; Wang, S; Chang, Z
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2015
卷号	453 期号:1 页码:128-132
关键词	gamma-ray burst: general supernovae: general cosmological parameters
通讯作者	Lin, HN (reprint author), Chongqing Univ, Dept Phys, Chongqing 401331, Peoples R China.
英文摘要	Gamma-ray bursts (GRBs) are widely proposed as an effective probe to trace the Hubble diagram of the Universe in high-redshift range. However, the calibration of GRBs is not as easy as that of Type-Ia supernovae (SNe Ia). Most calibrating methods at present make use one or some of the empirical luminosity correlations, e.g. Amati relation. One of the underlying assumptions of these calibrating methods is that the empirical correlation is universal over all redshifts. In this paper, we check to what extent this assumption holds. Assuming that SNe Ia exactly trace the Hubble diagram of the Universe, we re-investigate the Amati relation for low-redshift (z < 1.4) and high-redshift (z > 1.4) GRBs, respectively. It is found that the Amati relation of low-z GRBs differs from that of high-z GRBs at more than 3 sigma confidence level. This result is insensitive to cosmological models. We should be cautious when using Amati relation to reconstruct the Hubble diagram of the Universe.
学科主题	Astronomy & Astrophysics
类目[WOS]	Astronomy & Astrophysics
关键词[WOS]	GREATER-THAN 1 ; HUBBLE DIAGRAM ; COSMOLOGICAL IMPLICATIONS ; INTRINSIC SPECTRA ; PEAK LUMINOSITY ; AMATI RELATION ; DARK-MATTER ; MODEL ; REDSHIFT ; ENERGY
收录类别	SCI
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/20831]
专题	理论物理研究所_理论物理所1978-2010年知识产出
推荐引用方式 GB/T 7714	Lin, HN,Li, X,Wang, S,et al. Are long gamma-ray bursts standard candles?[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2015,453(1):128-132.
APA	Lin, HN,Li, X,Wang, S,&Chang, Z.(2015).Are long gamma-ray bursts standard candles?.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,453(1),128-132.
MLA	Lin, HN,et al."Are long gamma-ray bursts standard candles?".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 453.1(2015):128-132.