6 papers
Observational signatures of negative mass wormholes through their shadows
Shin'ichi Nojiri, Sergei D. Odintsov, Diego Sáez-Chillón Gómez
Systems containing objects with negative mass (NMOs) are considered. Such a system consists of one object with positive mass and one NMO, where a bound state exists even though the…
Black bounce as a quantum correction from string T-duality: Thermodynamics, energy conditions, and observational imprints from EHT
G. Alencar, T. M. Crispim, Diego Sáez-Chillón Gómez +1
Motivated by quantum gravity effects suggested by string theory, we investigate gravitational configurations sourced by an effective energy density inspired by T-duality. This dens…
General spherically symmetric black bounces within non-linear electrodynamics
G. Alencar, Albert Duran-Cabacés, Diego Rubiera-Garcia +1
Over the last years, the search of new regular black bounce solutions has drawn a lot of attentional over the international community working in gravitation. Indeed, in the era of…
Modified gravity/Dynamical Dark Energy vs CDM: is the game over?
Sergei D. Odintsov, Diego Sáez-Chillón Gómez, German S. Sharov
Over the last decades, tests on the standard model of cosmology, the so-called CDM model, have been widely analysed and compared with many different models for describing dark…
Boundary terms and on-shell action in Ricci-based gravity theories: the Hamiltonian formulation
Gerardo Mora-Pérez, Gonzalo J. Olmo, Diego Rubiera-Garcia +1
Considering the so-called Ricci-based gravity theories, a family of extensions of General Relativity whose action is given by a non-linear function of contractions and products of…
Propagation and emission of gravitational waves in the weak-field limit within the Palatini formalism
Albert Duran-Cabacés, Diego Sáez-Chillón Gómez
In the era of gravitational waves physics, when detections of wave fronts are increasing in number, sensibility, frequencies and distances, gravitational physics has entered a peri…