Improved constraints on violations of the Einstein equivalence principle in the electromagnetic sector with complementary cosmic probes

Abstract

Recent results have shown that a field non-minimally coupled to the electromagnetic Lagrangian can induce a violation of the Einstein equivalence principle. { This kind of coupling is present in a very wide class of gravitation theories.} In a cosmological context, this would break the validity of the cosmic distance duality relation as well as cause a time variation of the fine structure constant. Here, we improve constraints on this scenario by using four different observables: the luminosity distance of type Ia supernovae, the angular diameter distance of galaxy clusters, the gas mass fraction of galaxy clusters and the temperature of the cosmic microwave background at different redshifts. We consider four standard parametrizations adopted in the literature and show that, due to a high complementarity of the data, the errors are shrunk between 20\% and 40\% depending on the parametrization. We also show that our constraints are weakly affected by the geometry considered to describe the galaxy clusters. In short, no violation of the Einstein equivalence principle is detected up to redshifts $\sim$ 3.

14 pages, 3 figures, I table, Classical and Quantum Gravity, in press

References in corpus (14)

• Cosmology and Astrophysics from Relaxed Galaxy Clusters II: Cosmological Constraints
• X-ray and Sunyaev-Zel'dovich Effect Measurements of the Gas Mass Fraction in Galaxy Clusters
• Compatibility of the chameleon-field model with fifth-force experiments, cosmology, and PVLAS and CAST results
• Extended $f(R,L_m)$ gravity with generalized scalar field and kinetic term dependences
• Cosmological-model-independent tests for the distance-duality relation from Galaxy Clusters and Type Ia Supernova
• Breaking of the equivalence principle in the electromagnetic sector and its cosmological signatures
• Alpenglow - A Signature for Chameleons in Axion-Like Particle Search Experiments
• Probing the cosmic distance duality with strong gravitational lensing and supernovae Ia data
• Late-time cosmology of scalar-tensor theories with universal multiplicative coupling between the scalar field and the matter Lagrangian
• Searching for deviations from the General Relativity Theory with gas mass fraction of galaxy clusters and complementary probes
• Searching for cosmological signatures of the Einstein equivalence principle breaking
• Constraints on a possible variation of the fine structure constant from galaxy cluster data
• Galaxy clusters, type Ia supernovae and the fine structure constant
• Can galaxy clusters, type Ia supernovae and cosmic microwave background rule out a class of modified gravity theories?

Cited by in corpus (6)

• A test of cosmic distance duality relation using SPT-SZ galaxy clusters, Type Ia supernovae, and cosmic chronometers
• Galaxy clusters and a possible variation of the fine structure constant
• Jointly fitting weak lensing, X-ray and Sunyaev-Zel'dovich data to constrain scalar-tensor theories with clusters of galaxies
• Cosmic transparency and acceleration
• Galaxy clusters, cosmic chronometers and the Einstein equivalence principle
• Probing the Cosmic Distance Duality Relation via Non-Parametric Reconstruction for High Redshifts