16 citations · 17 across the 2 of their papers we have counts for
5 papers
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 e…
Shadows and optical appearance of black bounces illuminated by a thin accretion disk
Merce Guerrero, Gonzalo J. Olmo, Diego Rubiera-Garcia +1
We study the light rings and shadows of an uniparametric family of spherically symmetric geometries interpolating between the Schwarzschild solution, a regular black hole, and a tr…
Modelling and testing the equation of state for (Early) dark energy
Shin'ichi Nojiri, Sergei D. Odintsov, Diego Saez-Chillon Gomez +1
A general equation of state is considered for analysing the possible behaviors for (Early) dark energy that alleviates the Hubble parameter tension problem. By departing from the p…
Variational principle and boundary terms in gravity à la Palatini
Diego Sáez-Chillón Gómez
A general gravitational theory is considered within the Palatini formalism. By applying the variational principle and the usual conditions on the boundary, we show…
Extremal cosmological black holes in Horndeski gravity and the anti-evaporation regime
Ismael Ayuso, Diego Sáez-Chillón Gómez
Extremal cosmological black holes are analysed in the framework of the most general second order scalar-tensor theory, the~so-called Horndeski gravity. Such~extremal black holes ar…