CONSTRAINTS ON SPATIAL VARIATIONS IN THE FINE-STRUCTURE CONSTANT FROM PLANCK

被引:13
|
作者
O'Bryan, Jon [1 ]
Smidt, Joseph [1 ]
De Bernardis, Francesco [1 ]
Cooray, Asantha [1 ]
机构
[1] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA
来源
ASTROPHYSICAL JOURNAL | 2015年 / 798卷 / 01期
基金
美国国家科学基金会;
关键词
cosmic background radiation; cosmological parameters; inflation; TIME-VARIATION; ALPHA;
D O I
10.1088/0004-637X/798/1/18
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We use the cosmic microwave background (CMB) anisotropy data from Planck to constrain the spatial fluctuations of the fine-structure constant a at a redshift of 1100. We use a quadratic estimator to measure the four-point correlation function of the CMB temperature anisotropies and extract the angular power spectrum fine-structure constant spatial variations projected along the line of sight at the last scattering surface. At tens of degree angular scales and above, we constrain the fractional rms fluctuations of the fine-structure constant to be (delta alpha/alpha)(rms) < 3.4 x 10(-3) at the 68% confidence level. We find no evidence for a spatially varying alpha at a redshift of 10(3).
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页数:5
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