Finite-time cosmological singularities and the possible fate of the Universe
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 …
underlying fundamental theory, or indicate a change in the description of the physical reality …
Modified gravity theories on a nutshell: Inflation, bounce and late-time evolution
We systematically review some standard issues and also the latest developments of
modified gravity in cosmology, emphasizing on inflation, bouncing cosmology and late-time …
modified gravity in cosmology, emphasizing on inflation, bouncing cosmology and late-time …
Horizon-scale tests of gravity theories and fundamental physics from the Event Horizon Telescope image of Sagittarius A
Horizon-scale images of black holes (BHs) and their shadows have opened an
unprecedented window onto tests of gravity and fundamental physics in the strong-field …
unprecedented window onto tests of gravity and fundamental physics in the strong-field …
Unifying inflation with early and late dark energy epochs in axion gravity
VK Oikonomou - Physical Review D, 2021 - APS
We provide a theoretical model of F (R) gravity in which it is possible to describe in a unified
way inflation, an early and a late dark energy era, in the presence of a light axion particle …
way inflation, an early and a late dark energy era, in the presence of a light axion particle …
[HTML][HTML] Extended gravity description for the GW190814 supermassive neutron star
Very recently a compact object with a mass in the range 2.50÷ 2.67 M⊙ has been
discovered via gravitational waves detection of a compact binary coalescence. The mass of …
discovered via gravitational waves detection of a compact binary coalescence. The mass of …
[HTML][HTML] Causal limit of neutron star maximum mass in f (R) gravity in view of GW190814
We investigate the causal limit of maximum mass for stars in the framework of f (R) gravity.
We choose a causal equation of state, with variable speed of sound, and with the transition …
We choose a causal equation of state, with variable speed of sound, and with the transition …
[HTML][HTML] Rectifying Einstein-Gauss-Bonnet inflation in view of GW170817
In this work we introduce a new theoretical framework for Einstein-Gauss-Bonnet theories of
gravity, which results to particularly elegant, functionally simple and transparent gravitational …
gravity, which results to particularly elegant, functionally simple and transparent gravitational …
[HTML][HTML] Swampland implications of GW170817-compatible Einstein-Gauss-Bonnet gravity
SD Odintsov, VK Oikonomou - Physics Letters B, 2020 - Elsevier
Abstract We revisit the Einstein-Gauss-Bonnet theory in view of the GW170817 event, which
compels that the gravitational wave speed is equal to c T 2= 1 in natural units. We use an …
compels that the gravitational wave speed is equal to c T 2= 1 in natural units. We use an …
Inflationary cosmology in modified gravity theories
K Bamba, SD Odintsov - Symmetry, 2015 - mdpi.com
We review inflationary cosmology in modified gravity such as R 2 gravity with its extensions
in order to generalize the Starobinsky inflation model. In particular, we explore inflation …
in order to generalize the Starobinsky inflation model. In particular, we explore inflation …
Further stable neutron star models from f (R) gravity
AV Astashenok, S Capozziello… - Journal of Cosmology …, 2013 - iopscience.iop.org
Neutron star models in perturbative f (R) gravity are considered with realistic equations of
state. In particular, we consider the FPS, SLy and other equations of state and a case of …
state. In particular, we consider the FPS, SLy and other equations of state and a case of …