Big-bang nucleosynthesis and cosmic microwave background constraints on nonminimally coupled theories of gravity

被引：20

作者：

Azevedo, R. P. L. ^{[1
]}

Avelino, P. P. ^{[1
]}

机构：

[1] Univ Porto, Inst Astrofis & Ciencias Espaco, CAUP, Rua Estrelas, PT-4150762 Porto, Portugal

来源：

PHYSICAL REVIEW D | 2018年 / 98卷 / 06期

关键词：

DARK-MATTER; ENERGY;

D O I：

10.1103/PhysRevD.98.064045

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In this paper, we show that the baryon-to-photon ratio eta is in general not conserved before decoupling in nonminimally coupled theories of gravity. We use big-bang nucleosynthesis and cosmic microwave background (CMB) limits on the baryon-to-photon ratio eta to derive new constraints on modified gravity theories with a universal nonminimal coupling between matter and curvature, showing that they rule out a specific class of models previously considered in the literature as a substitute for the dark matter. We also compare these new constraints with the ones obtained from the COBE-FIRAS limits on CMB spectral distortions, highlighting the complementarity between them.

引用

页数：5

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