New constraints on variations of the fine structure constant from CMB anisotropies

被引：42

作者：

Menegoni, Eloisa ^{[1
,2
]}

Galli, Silvia ^{[1
,2
,3
]}

Bartlett, James G. ^{[3
,4
]}

Martins, C. J. A. P. ^{[5
,6
]}

Melchiorri, Alessandro ^{[1
,2
]}

机构：

[1] Univ Roma La Sapienza, Dept Phys, I-00185 Rome, Italy

[2] Univ Roma La Sapienza, Ist Nazl Fis Nucl, I-00185 Rome, Italy

[3] Univ Paris Diderot, Lab Astroparticule & Cosmol APC, F-75205 Paris 13, France

[4] CALTECH, Jet Prop Lab, Pasadena, CA USA

[5] Univ Porto, Ctr Astrofis, P-4150762 Oporto, Portugal

[6] Univ Cambridge, DAMTP, Cambridge CB3 0WA, England

来源：

PHYSICAL REVIEW D | 2009年 / 80卷 / 08期

基金：

美国国家航空航天局;

关键词：

POWER SPECTRUM; TIME-VARIATION; 2003; FLIGHT; POLARIZATION; ALPHA;

D O I：

10.1103/PhysRevD.80.087302

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We demonstrate that recent measurements of cosmic microwave background temperature and polarization anisotropy made by the ACBAR, QUAD, and BICEP experiments substantially improve the cosmological constraints on possible variations of the fine structure constant in the early universe. This data, combined with the five year observations from the WMAP mission, yield the constraint alpha/alpha(0) = 0 0.987 +/- 0.012 at 68% C.L. The inclusion of the new Hubble Space Telescope constraints on the Hubble constant further increases the accuracy to alpha/alpha(0) = 1.001 +/- 0.007 at 68% C.L., bringing possible deviations from the current value below the 1% level and improving previous constraints by a factor of similar to 3.

引用

页数：3

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