| 基于γ暴等观测限制宇宙学参数与暗能量模型 |
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| 引用本文： | 刘建炜,王发印.基于γ暴等观测限制宇宙学参数与暗能量模型[J].天文学报,2011,52(6):467-480. |
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| 作者姓名： | 刘建炜 王发印 |
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| 作者单位： | 1. 中国科学院紫金山天文台 南京210008;中国科学院研究生院 北京100049
2. 南京大学天文与空间科学学院 南京210093;现代天文与天体物理教育部重点实验室 南京210093 |
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| 基金项目： | 国家自然科学基金项目，国家重点基础研究发展计划项目，中国博士后科学基金项目 |
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| 摘 要： | 利用Union2 557个Ia型超新星数据限制宇宙学参数qo、jo和so,在红移z≤1.4范围内校准5个γ暴(gamma-ray burst,GRB)光度关系.假设γ暴光度关系不随红移演化,得到66个高红移γ暴的距离模数.最后综合利用宇宙微波背景(Cosmic Microwave Background,CMB)辐射观测数据、重子声波震荡(Baryon AcousticOscillations,BAO)观测数据与116个具有红移的γ暴数据限制几个常见的暗能量模型.根据贝叶斯判据(Bayesian Information Criterion,BIC),发现ACDM模型是最好的模型;根据Akaike判据(Akaike Information Criterion,AIC),发现JBP模型是最好的模型.
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| 关 键 词： | 伽玛射线暴 普通 宇宙学 宇宙学参数 宇宙学 暗能量 |
Gamma-ray Bursts and Other Observations: Constraints on Cosmological Parameters and Dark Energy Models |
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| LIU Jian-wei,WANG Fa-yin.Gamma-ray Bursts and Other Observations: Constraints on Cosmological Parameters and Dark Energy Models[J].Acta Astronomica Sinica,2011,52(6):467-480. |
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| Authors: | LIU Jian-wei WANG Fa-yin |
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| Institution: | LIU Jian-wei~(1,2) WANG Fa-yin~(3,4) (1 Purple Mountain Observatory,Chinese Academy of Sciences,Nanjing 210008) (2 Graduate University of Chinese Academy of Sciences,Beijing 100049) (3 School of Astronomy & Space Science,Nanjing University,Nanjing 210093) (4 Key Laboratory of Modern Astronomy and Astrophysics(Nanjing University),Ministry of Education,Nanjing 210093) |
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| Abstract: | We use the newly released Union2 SNe Ia dataset to constrain cosmographic parameters,namely deceleration,jerk and snap parameters（q0,j0 and s0）,then calibrate five luminosity relations of gamma-ray bursts（GRBs） at redshift z≤1.4.Supposing that the GRB luminosity relations do not evolve with redshift,we obtain the distance moduli of 66 high-redshift GRBs.At last,we combine the observation datasets including Cosmic Microwave Background,Baryon Acoustic Oscillations and 116 GRBs to constrain some widely-discussed dark energy models.We find the ACDM model is the best according to the Bayesian Information Criterion,and the JBP model is the best according to the Akaike Information Criterion. |
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| Keywords: | gamma-ray burst:general cosmology:cosmographic parameters cosmology dark energy |
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