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题名: Effect of gamma-ray burst (GRB) spectra on the empirical luminosity correlations and the GRB Hubble diagram
作者: Lin, HN ;  Li, X ;  Chang, Z
刊名: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
出版日期: 2016
卷号: 459, 期号:3, 页码:2501-2512
关键词: gamma-ray burst: general ;  cosmological parameters
学科分类: Astronomy & Astrophysics
DOI: http://dx.doi.org/10.1093/mnras/stw817
通讯作者: Lin, HN (reprint author), Chongqing Univ, Dept Phys, Chongqing 401331, Peoples R China.
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.
类目[WOS]: Astronomy & Astrophysics
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
收录类别: SCI
项目资助者: National Natural Science Fund of China (NSFC) [11305181, 11547305] ;  Open Project Program of State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, China [Y5KF181CJ1] ;  NSFC [11375203]
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/21604
Appears in Collections:理论物理所2016年知识产出_期刊论文

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Recommended Citation:
Lin, HN,Li, X,Chang, Z. 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):2501-2512.
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