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Non-Minimally Coupled Chain Inflation at High Scales
Miguel Barroso Varela, Orfeu Bertolami, Katherine Freese +1
Chain inflation offers an alternative to standard slow-roll dynamics, with accelerated expansion proceeding through a sequence of rapid quantum tunneling events between metastable…
Is cosmological data suggesting a nonminimal coupling between matter and gravity?
Miguel Barroso Varela, Orfeu Bertolami
Theoretical predictions from a modified theory of gravity with a nonminimal coupling between matter and curvature are compared to data from recent cosmological surveys. We use type…
Gravitational waves from a curvature-induced phase transition of a Higgs-portal dark matter sector
Andreas Mantziris, Orfeu Bertolami
The study of interactions between dark matter and the Higgs field opens an exciting connection between cosmology and particle physics, since such scenarios can impact the features…
Cosmology with SKA
Orfeu Bertolami, Cláudio Gomes
We review some of the major contributions that the Square Kilometer Array (SKA) will provide for Cosmology. We discuss the SKA measurements of the equation of state parameter for d…
The Layzer-Irvine equation in theories with non-minimal coupling between matter and curvature
Orfeu Bertolami, Claudio Gomes
We derive the Layzer-Irvine equation for alternative gravitational theories with non-minimal coupling between curvature and matter for an homogeneous and isotropic Universe. As an…
Testing the interaction of dark energy to dark matter through the analysis of virial relaxation of clusters Abell Clusters A586 and A1689 using realistic density profiles
Orfeu Bertolami, Francisco Gil Pedro, Morgan Le Delliou
Interaction between dark energy and dark matter is probed through deviation from the virial equilibrium for two relaxed clusters: A586 and A1689. The evaluation of the virial equil…