Cosmic microwave background constraints on the strong equivalence principle -: art. no. 103528

被引：4

作者：

Boucher, V ^{[1
]}

Gérard, JM ^{[1
]}

Vandergheynst, P ^{[1
]}

Wiaux, Y ^{[1
]}

机构：

[1] Swiss Fed Inst Technol, Signal Proc Inst, CH-1015 Lausanne, Switzerland

来源：

PHYSICAL REVIEW D | 2004年 / 70卷 / 10期

关键词：

D O I：

10.1103/PhysRevD.70.103528

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the effect of a violation of the strong equivalence principle (SEP) on the cosmic microwave background (CMB). Such a violation would modify the weight of baryons in the primordial gravitational potentials and hence their impact in the establishment of the photon-baryon plasma acoustic oscillations before recombination. This cosmological Nordtvedt effect alters the odd peaks height of the CMB temperature anisotropy power spectrum. A gravitational baryonic mass density of the Universe may already be inferred at the first peak scale from the analysis of Wilkinson microwave anisotropy probe (WMAP) data. Experimental constraints on a primordial SEP violation are derived from a comparison with the Universe's inertial baryonic mass density measured either in a full analysis of the CMB, or in the framework of the standard big bang nucleosynthesis (BBN).

引用

页码：103528 / 1

页数：8

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