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Gamma-Ray Emissions of AGN and Cosmological Standard Candles
Alternative Title活动星系核的伽玛辐射和宇宙标准烛光
Xie ZH(谢照华); Zhang X(张雄); Liu HT(刘洪涛); Du LM(杜雷鸣)
Source Publication天文研究与技术.国家天文台台刊
Contribution Rank第2完成单位
Indexed ByCSCD
Keyword活动星系核 伽玛射线噪-宇宙学 观测-宇宙学 红移-哈勃图
AbstractIn this work, we compile a sample which contains 71 Gev Gamma-ray-loud Active Galactic Nuclei (AGNs) (14 BL Lacs and 57 FSRQs), 53 FR Ⅰ radio galaxies and 63 FR Ⅱ radio galaxies. We make a nonlinear least-square fit to this sample, and find that the best fit value of the Hubble constant is H0 =71 .5±3 .8 kms-1Mpc-1 with a reduced χ2 2 .46 by assuming Mv=-23 .0 and accepting q0=1 .0, and the corresponding regression line has a correlation index R≈0 .78. The best fit value of H0 =71 .5 ±3 .8 kms-1Mpc-1 is in well agreement with H0 =72 ±8 kms-1 obtained by the Hubble Space Telescope Key Project .Our results show that the Gev Gamma-ray emissions of AGNs can be used as cosmological standard candles indeed.
Other Abstract编辑了一个样本,其中包括71个Gev伽玛射线噪的活动星系核(14个BL Lac天体和57个平谱射电类星体),53个FRⅠ型射电星系和63个FRⅡ型射电星系。文章采用了非线性最小二乘法来拟合这个样本。当假设Mv=-23.0时,得到一个达到最佳拟合的哈勃常数,其拟合值为H0=71.5±3.8kms-1Mpc-1。该值与通过哈勃望远镜关键计划所得到的哈勃常数值H0=71.5±8kms-1Mpc-1符合得很好。其结果表明活动星系核的Gev伽玛辐射可以被用作宇宙标准烛光。
Subject Area天文学
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Document Type期刊论文
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GB/T 7714
Xie ZH,Zhang X,Liu HT,et al. Gamma-Ray Emissions of AGN and Cosmological Standard Candles[J]. 天文研究与技术.国家天文台台刊,2005,2(4):5-13.
APA 谢照华,张雄,刘洪涛,&杜雷鸣.(2005).Gamma-Ray Emissions of AGN and Cosmological Standard Candles.天文研究与技术.国家天文台台刊,2(4),5-13.
MLA 谢照华,et al."Gamma-Ray Emissions of AGN and Cosmological Standard Candles".天文研究与技术.国家天文台台刊 2.4(2005):5-13.
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