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Inflation Revisited and Dark Energy Corrections
S. D. Odintsov, V. K. Oikonomou
The vacuum model is known to generate a quasi-de Sitter evolution for inflation, using solely the slow-roll assumptions. Using standard reconstruction techniques, we demonstr…
Pre-Inflationary Bounce Effects on Primordial Gravitational Waves of Gravity
S. D. Odintsov, V. K. Oikonomou
In this work we shall study a possible pre-inflationary scenario for our Universe and how this might be realized by gravity. Specifically, we shall introduce a scenario in w…
Ghost-free Gravity
S. Nojiri, S. D. Odintsov, V. K. Oikonomou +1
In this work we shall address the ghost issue of gravity, which is known to be plagued with ghost degrees of freedom. These ghosts occur due to the…
Quantitative Predictions for Gravity Primordial Gravitational Waves
S. D. Odintsov, V. K. Oikonomou, F. P. Fronimos
In this work we shall develop a quantitative approach for extracting predictions on the primordial gravitational waves energy spectrum for gravity. We shall consider two dis…
Anisotropic compact stars in higher-order curvature theory
G. G. L. Nashed, S. D. Odintsov, V. K. Oikonomou
In this paper, we shall consider spherically symmetric spacetime solutions describing the interior of stellar compact objects, in the context of higher-order curvature theory of th…
Novel Stellar Astrophysics from Extended Gravity
A. V. Astashenok, S. Capozziello, S. D. Odintsov +1
Novel implications on neutron stars come from extended gravity. Specifically, the GW190814 event indicated the probability of having large mass stars in the mass-gap region $2.5-5\…
Neutron Stars in Scalar-tensor Gravity with Quartic Order Scalar Potential
S. D. Odintsov, V. K. Oikonomou
In this work we investigate the effects of a non-minimally coupled quartic order scalar model on static neutron stars, with the non-minimal coupling in the Jordan frame being of th…
Late-Time Cosmology of Scalar-Coupled Gravity
S. D. Odintsov, V. K. Oikonomou, F. P. Fronimos
In this work by using a numerical analysis, we investigate in a quantitative way the late-time dynamics of scalar coupled gravity. Particularly, we consider a Ga…
-Inflation-corrected Einstein-Gauss-Bonnet Gravity with Massless Primordial Gravitons
S. D. Odintsov, V. K. Oikonomou, F. P. Fronimos
In the present paper, we study the inflationary phenomenology of a -inflation corrected Einstein-Gauss-Bonnet theory. Non-canonical kinetic terms are known for producing Jean in…