Lensed cosmic microwave background constraints on post-general-relativity parameters

被引：13
|
作者：
Serra, Paolo [1 ]
Cooray, Asantha [1 ]
Daniel, Scott F. [2 ]
Caldwell, Robert [2 ]
Melchiorri, Alessandro [3 ,4 ]
机构：
[1] Univ Calif Irvine, Dept Phys & Astron, Ctr Cosmol, Irvine, CA 92697 USA
[2] Dartmouth Coll, Dept Phys & Astron, Hanover, NH 03755 USA
[3] Univ Roma La Sapienza, Sez INFN, I-00185 Rome, Italy
[4] Univ Roma La Sapienza, Dept Phys, I-00185 Rome, Italy
来源：
PHYSICAL REVIEW D | 2009年 / 79卷 / 10期
关键词：
POWER SPECTRUM; PROBE; CMB; POLARIZATION; GRAVITY;
D O I：
10.1103/PhysRevD.79.101301
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The constraints on departures from general relativity (GR) at cosmological length scales due to cosmic microwave background (CMB) data are discussed. The departure from GR is measured by the ratio, parametrized as 1+pi(0)(1+z)(-S), between the gravitational potentials conventionally appearing in the geodesic equation and the Poisson equation. Current CMB data indicate pi(0)=1.67(-1.87)(+3.07) at the 2 sigma confidence level, while S remains unconstrained. The departure from GR affects the lensing conversion of E-mode into B-mode polarization. Hence, the lensing measurements from CMBpol alone should be able to improve the constraint to pi(0)< 0.52 (2 sigma) for a fiducial pi(0)=0 model independent of S.
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页数：4
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