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Propagation of Gravitational Waves in a Dynamical Wormhole Background for Two-scalar Einstein-Gauss-Bonnet Theory
E. Elizalde, Shin'ichi Nojiri, S. D. Odintsov +1
In this work, we propose a model of Einstein--Gauss-Bonnet gravity coupled with two scalar fields. The two scalar fields are considered to be ``frozen'' or they become non-dynamica…
Propagation of Gravitational Waves in Einstein--Gauss-Bonnet Gravity for Cosmological and Spherically Symmetric Spacetimes
Shin'ichi Nojiri, S. D. Odintsov, V. K. Oikonomou
In this work, we examine the propagation of gravitational waves in cosmological and astrophysical spacetimes in the context of Einstein--Gauss-Bonnet gravity, in view of the GW1708…
Finite-time Cosmological Singularities and the Possible Fate of the Universe
Jaume de Haro, Shin'ichi Nojiri, S. D. Odintsov +2
Singularities in any physical theory are either remarkable indicators of the unknown underlying fundamental theory, or indicate a change in the description of the physical reality.…
Compact Stars with Dark Energy in General Relativity and Modified Gravity
Artyom V. Astashenok, Sergey D. Odintsov, Vasilis K. Oikonomou
We investigate realistic models of compact objects, focusing on neutron and strange stars, composed by dense matter and dark energy in the form of a simple fluid or scalar field in…
Inflationary Attractors Predictions for Static Neutron Stars in the Mass-Gap Region
S. D. Odintsov, V. K. Oikonomou
In this work we study static neutron stars in the context of several inflationary models which are popular in cosmology. These inflationary models are non-minimally coupled scalar…
Inflationary Dynamics and Swampland Criteria for Modified Gauss-Bonnet Gravity Compatible with GW170817
S. D. Odintsov, V. K. Oikonomou, F. P. Fronimos
In this article we present an alternative formalism for the inflationary phenomenology of rescaled Einstein-Gauss-Bonnet models which are in agreement with the GW170817 event. By c…