Constraints on the global topology and size of the universe from the cosmic microwave background

被引：14

作者：

Aslanyan, Grigor ^{[1
]}

Manohar, Aneesh V. ^{[1
]}

机构：

[1] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2012年 / 06期

关键词：

physics of the early universe; gravity; CMBR theory; cosmological parameters from CMBR; DODECAHEDRAL SPACE TOPOLOGY; ANISOTROPY; SKY; CIRCLES; AXIS; MAPS;

D O I：

10.1088/1475-7516/2012/06/003

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the possibility that the universe is flat, but with one or more space directions compactified. Using the seven-year WMAP data, we constrain the size of the compact dimension to be L/L-0 >= 1.27, 0.97, 0.57 at 95% confidence for the case of three, two and one compactified dimension, respectively, where L-0 = 14.4 Gpc is the distance to the last scattering surface. We find a statistically significant signal for a compact universe, and the best-fit spacetime is a universe with two compact directions of size L/L-0 = 1.9, with the non-compact direction pointing in a direction close to the velocity of the Local Group.

引用

页数：24

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