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

• Tipo: Artigo em Revista Científica Internacional
• Data: 2018

Autores

Azevedo, RPL (Autor) Outra; Avelino, PP (Autor) FCUP

Revista

Título: Physical Review D

Vol. 98

ISSN: 2470-0010

Editora: American Physical Society

Indexação

ISI Web of Knowledge - 14 Citações

Scopus - 14 Citações

Outras Informações

ID Authenticus: P-00P-NCK

DOI: 10.1103/physrevd.98.064045

Abstract (EN): 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 5