Is the cosmic transparency spatially homogeneous?

Is the cosmic transparency spatially homogeneous?
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宇宙透明度在空间上是均匀的吗?

DOI:
10.1088/1475-7516/2012/10/029
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发表时间:
2012
影响因子:
6.4
通讯作者:
Li, Zhengxiang
Li, Zhengxiang
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Chen, Jun;Wu, Puxun;Yu, Hongwei;Li, Zhengxiang

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本文利用最新的BAO和Union 2 SNIa观测数据研究了宇宙不透明性的约束条件,发现最佳拟合值似乎表明,在红移0.20-0.35,0.35-0.44和0.60-0.73的区域,宇宙不透明性较好,而在红移0.106-0.20的区域,宇宙透明性较好。0.44-0.57和0.57-0.60。然而,我们的结果在1σ置信水平下仍然与透明宇宙一致,即使最佳拟合宇宙不透明度随着红移的变化在零和一些非零值之间振荡。
We study the constraints on the cosmic opacity using the latest BAO and Union2 SNIa data in this paper and find that the best fit values seem to indicate that an opaque universe is preferred in redshift regions 0.20-0.35, 0.35-0.44 and 0.60-0.73, whereas, a transparent universe is favored in redshift regions 0.106-0.20, 0.44-0.57 and 0.57-0.60. However, our result is still consistent with a transparent universe at the 1σ confidence level, even though the best-fit cosmic opacity oscillates between zero and some nonzero values as the redshift varies.
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