Effect of gamma-ray burst (GRB) spectra on the empirical luminosity correlations and the GRB Hubble diagram

doi:http://dx.doi.org/10.1093/mnras/stw817

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	Effect of gamma-ray burst (GRB) spectra on the empirical luminosity correlations and the GRB Hubble diagram
	Lin, HN ; Li, X 2; Chang, Z 1
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2016
卷号	459 期号:3 页码:2501-2512
关键词	gamma-ray burst: general COSMOLOGICAL IMPLICATIONS cosmological parameters E-P,E-I-E-ISO CORRELATION INTRINSIC SPECTRA STANDARD CANDLES PEAK LUMINOSITY DARK ENERGY REDSHIFT MODEL CATALOG CALIBRATION
DOI	http://dx.doi.org/10.1093/mnras/stw817
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.
学科主题	Astronomy & Astrophysics
语种	英语
资助机构	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]
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/23114]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China 2.Chongqing Univ, Dept Phys, Chongqing 401331, Peoples R China 3.Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	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.
APA	Lin, HN,Li, X,&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),2501-2512.
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):2501-2512.