106 citations · 492 across the 14 of their papers we have counts for
14 papers
Analyzing Quasi-normal modes spectrum in asymptotically de Sitter black bounces and their optical appearance
G. Alencar, Albert Duran-Cabacés, A. Lima +2
This work explores asymptotically de Sitter black-bounce spacetimes, obtained as a regular extension of the Schwarzschild-de Sitter geometry via the Simpson-Visser prescription. Th…
Horizon singularity, energy conditions and shadows in time-dependent and spherically symmetric spacetime
Shin'ichi Nojiri, Sergei D. Odintsov, Diego Sáez-Chillón Gómez +1
Some dynamical spacetime solutions that describe ultra-compact objects are analysed. We show that by turning a static spacetime that describes a one-way wormhole into a dynamical t…
The gravitational wave-black hole imaging correspondence for modified black holes
David Díaz-Guerra, Ángel Rincón, Diego Rubiera-Garcia +1
Black holes (BHs) can be studied via fundamentally different observational channels that probe complementary aspects of their physics. While BH imaging provides access to the quasi…
Testing viable extensions of Einstein-Gauss-Bonnet gravity
Sergei D. Odintsov, Diego Saez-Chillon Gomez, German S. Sharov
Some models within the framework of Gauss-Bonnet gravities are considered in the presence of a non-minimally coupled scalar field. By imposing a particular constraint on the scalar…
General slow-roll inflation in gravity under the Palatini approach
Sabit Bekov, Kairat Myrzakulov, Ratbay Myrzakulov +1
Slow-roll inflation is analyzed in the context of modified gravity within the Palatini formalism. As shown in the literature, inflation in this framework requires the presence of n…
Analyzing the tension in gravity models
Sergei D. Odintsov, Diego Sáez-Chillón Gómez, German S. Sharov
The Hubble constant tension problem is analysed in the framework of a class of modified gravity, the so-called gravity. To do so, we explore two models: an exponential and a…
Constant roll inflation in multifield models
Merce Guerrero, Diego Rubiera-Garcia, Diego Saez-Chillon Gomez
Constant roll inflation is analyzed in the presence of multi scalar fields which are assumed to be described by a constant roll rate each. The different cases are studied and the c…
Testing the equation of state for viscous dark energy
Sergei D. Odintsov, Diego Saez-Chillon Gomez, German S. Sharov
Some cosmological scenarios with bulk viscosity for the dark energy fluid are considered. Based on some considerations related to hydrodynamics, two different equations of state fo…
The inflationary universe in F(R) gravity with antisymmetric tensor fields and their suppression during the universe evolution
Emilio Elizalde, Sergei D. Odintsov, Tanmoy Paul +1
The intriguing question, why the present scale of the universe is free from any perceptible footprints of rank-2 antisymmetric tensor fields? (generally known as Kalb-Ramond fields…
Analysing dissipative effects in the CDM model
Norman Cruz, Esteban Gonzalez, Samuel Lepe +1
In the present paper, the effects of viscous dark matter are analysed within the CDM model. Here we consider bulk viscosity through the Israel-Stewart theory approach, leading t…
Testing logarithmic corrections on -exponential gravity by observational data
Sergei D. Odintsov, Diego Saez-Chillon Gomez, German S. Sharov
This paper is devoted to the analysis of a class of gravity, where additional logarithmic corrections are assumed. The gravitational action includes an exponential term and…
Inflation in mimetic f(G) gravity
Yi Zhong, Diego Saez-Chillon Gomez
Mimetic gravity is analysed in the framework of some extensions of General Relativity, where a function of the Gauss-Bonnet invariant in four dimensions is considered. By assuming…
Cosmological bouncing solutions in extended teleparallel gravity theories
Alvaro de la Cruz-Dombriz, Gabriel Farrugia, Jackson Levi Said +1
In the context of extended Teleparallel gravity theories with a 3+1 dimensions Gauss-Bonnet analog term, we address the possibility of these theories reproducing several well-known…
Cosmological reconstructed solutions in extended teleparallel gravity theories with a teleparallel Gauss-Bonnet term
Alvaro de la Cruz-Dombriz, Gabriel Farrugia, Jackson Levi Said +1
In the context of extended Teleparallel gravity theories with a 3+1 dimensions Gauss-Bonnet analog term, we address the possibility of these theories reproducing several well-known…