Testing the local-void alternative to dark energy using galaxy pairs

Testing the local-void alternative to dark energy using galaxy pairs
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使用星系对测试暗能量的局域空洞替代方案

DOI:
10.1093/mnras/stt652
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发表时间:
2013-04
影响因子:
4.8
通讯作者:
Dai, Z. G.
Dai, Z. G.
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Wang, F. Y.;Dai, Z. G.

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我们可能生活在宇宙中的一个特殊地方,靠近一个巨大的、径向不均匀的空洞的中心,这一可能性最近引起了人们的注意,它可以作为暗能量或修正引力的替代品来解释加速的宇宙。我们发现,星系对的方向分布可以用来检验哥白尼原理,即我们不在宇宙的中心或特殊区域。目前流行的空洞模型不能同时拟合最新的Ia型超新星、宇宙微波背景数据和星系对的方位分布。我们的研究结果排除了空洞模型在4sigma $的置信水平作为宇宙加速的起源,有利于哥白尼原理。
The possibility that we live in a special place in the universe, close to the center of a large, radially inhomogeneous void, has attracted attention recently as an alternative to dark energy or modified gravity to explain the accelerating universe. We show that the distribution of orientations of galaxy pairs can be used to test the Copernican principle that we are not in a central or special region of Universe. The popular void models can not fit both the latest type Ia supernova, cosmic microwave background data and the distribution of orientations of galaxy pairs simultaneously. Our results rule out the void models at the $4\sigma$ confidence level as the origin of cosmic acceleration and favor the Copernican principle.
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