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Distance-duality in theories with a nonminimal coupling to gravity

R. P. L. Azevedo, P. P. Avelino

We show that gravitational theories with a nonminimal coupling (NMC) to the matter fields lead to a violation of Etherington’s distance-duality relation, which relates the luminosity and angular-diameter distances. We derive constraints on power-law and exponential NMC models using existing measurements of type Ia supernovae and baryon acoustic oscillations throughout the redshift range 0 < z < 1.5. These complement previous constraints derived from cosmic-microwave background radiation and big bang nucleosynthesis data.

General Relativity and Quantum Cosmology; Astrophysics - Cosmology and Nongalactic Astrophysics

Physical Review D
Volume 104, Issue 8
2021 October

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Faculdade de Ciências da Universidade de Lisboa Universidade do Porto Faculdade de Ciências e Tecnologia da Universidade de Coimbra
Fundação para a Ciência e a Tecnologia COMPETE 2020 PORTUGAL 2020 União Europeia