观测数据对宇宙透明度的限制
On constraints on the cosmic transparency with the observational data
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摘要: 用Union2.1超新星观测数据和哈勃参数观测数据限制了宇宙的总体透明度,最佳拟合值支持不完全透明的宇宙,但是在2σ误差范围内并不排除完全透明的宇宙.然后限制了不同红移位置的宇宙透明度,最佳拟合值表明随着红移的变化宇宙透明度也变化,并非处处都是均匀的.Abstract: In the paper,the cosmic transparency has been constrained with the Union2.1 data and the Hubble parameter data,the best fit results of the cosmic transparency are consistent with a opaque universe,but a transparent universe is consistent with observations at the 2σ confidence level.And then,we have constrained the cosmic transparency with different redshift,the best-fit cosmic opacity oscillates between zero and some nonzero values,which is not always uniform.
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