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Lin, HN; Li, X1; Chang, Z2
Effect of gamma-ray burst (GRB) spectra on the empirical luminosity correlations and the GRB Hubble diagram
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Language英语
Keywordgamma-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
AbstractThe 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.
2016
Volume459Issue:3Pages:2501-2512
Subject AreaAstronomy & Astrophysics
DOIhttp://dx.doi.org/10.1093/mnras/stw817
Indexed BySCI
Funding OrganizationNational 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]
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Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/23114
Collection理论物理所科研产出_SCI论文
Affiliation1.Chongqing Univ, Dept Phys, Chongqing 401331, Peoples R China
2.Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China
3.Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
Recommended Citation
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.
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