Observational cosmology and the cosmic distance duality relation
Observational cosmology and the cosmic distance duality relation
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DOI：
10.1088/1475-7516/2011/05/023
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发表时间：
2011-02
期刊：
影响因子：
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通讯作者：
Remya Nair;Sanjay Jhingan;Deepak Jain
中科院分区：
文献类型：
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作者：
Remya Nair;Sanjay Jhingan;Deepak Jain
研究了角直径与光度距离之间的宇宙距离对偶关系的有效性。为了检验这种对偶关系，我们使用了最新的Ia型超新星（SN Ia）数据来估计光度距离。角直径距离的估计来自星系团（真实的和模拟）和FRIIb射电星系的样本。我们用四种不同的方法将距离对偶关系参数化为红移的函数，发现假设星系团为球形等温β模型的模拟数据集不包含距离对偶关系，而假设星系团为椭圆β模型的真实的数据集包含距离对偶关系。
We have studied the validity of cosmic distance duality relation between angular diameter and luminosity distances. To test this duality relation, we have used the latest Union2 Supernovae type Ia (SN Ia) data for estimating the luminosity distance. The estimation of angular diameter distance comes from the samples of galaxy clusters (real and mock) and FRIIb radio galaxies. We have parameterized the distance duality relation as a function of redshift in four different ways, and found that the mock data set, which assumes a spherical isothermal β model for the galaxy clusters does not accommodate the distance duality relation, while the real data set which assumes elliptical β model does.