Effect of gamma-ray burst (GRB) spectra on the empirical luminosity correlations and the GRB Hubble diagram
Lin, HN; Li, X; Chang Z(常哲); Chang, Z
刊名MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2016
卷号459期号:3页码:2501
关键词gamma-ray burst: general cosmological parameters
DOI10.1093/mnras/stw817
文章类型Article
英文摘要The spectra of gamma-ray bursts (GRBs) in a wide energy range can usually be well described by the Band function, which is a two smoothly jointed power laws cutting at a breaking energy. Below the breaking energy, the Band function reduces to a cut-off power law, while above the breaking energy it is a simple power law. However, for some detectors [such as the Swift-Burst Alert Telescope (BAT)] whose working energy is well below or just near the breaking energy, the observed spectra can be fitted to cut-off power law with enough precision. Besides, since the energy band of Swift-BAT is very narrow, the spectra of most GRBs can be fitted well even using a simple power law. In this paper, with the most up-to-date sample of Swift-BAT GRBs, we study the effect of different spectral models on the empirical luminosity correlations, and further investigate the effect on the reconstruction of GRB Hubble diagram. We mainly focus on two luminosity correlations, i.e. the Amati relation and Yonetoku relation. We calculate these two luminosity correlations in both cases that the GRB spectra are modelled by Band function and cut-off power law. It is found that both luminosity correlations only moderately depend on the choice of GRB spectra. Monte Carlo simulations show that Amati relation is insensitive to the high-energy power-law index of the Band function. As a result, the GRB Hubble diagram calibrated using luminosity correlations is almost independent on the GRB spectra.
关键词[WOS]COSMOLOGICAL IMPLICATIONS ; E-P,E-I-E-ISO CORRELATION ; INTRINSIC SPECTRA ; STANDARD CANDLES ; PEAK LUMINOSITY ; DARK ENERGY ; REDSHIFT ; MODEL ; CATALOG ; CALIBRATION
语种英语
WOS记录号WOS:000379840900018
引用统计
被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/260617
专题中国科学院高能物理研究所_理论物理室_期刊论文
作者单位中国科学院高能物理研究所
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Lin, HN,Li, X,Chang Z,et al. Effect of gamma-ray burst (GRB) spectra on the empirical luminosity correlations and the GRB Hubble diagram[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2016,459(3):2501.
APA Lin, HN,Li, X,常哲,&Chang, Z.(2016).Effect of gamma-ray burst (GRB) spectra on the empirical luminosity correlations and the GRB Hubble diagram.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,459(3),2501.
MLA Lin, HN,et al."Effect of gamma-ray burst (GRB) spectra on the empirical luminosity correlations and the GRB Hubble diagram".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 459.3(2016):2501.
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