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Screened and Unscreened Solutions for Relativistic Star in de Rham-Gabadadze-Tolley (dRGT) Massive Gravity
Masashi Yamazaki, Taishi Katsuragawa, Sergei D. Odintsov +1
We study the static and spherical symmetric (SSS) configurations in the non-minimal model of the de Rham-Gabadadze-Tolley (dRGT) massive gravity with a flat reference metric. Consi…
Ghost-free Gauss-Bonnet Theories of Gravity
S. Nojiri, S. D. Odintsov, V. K. Oikonomou
In this work we develop a theoretical framework for Gauss-Bonnet modified gravity theories, in which ghost modes can be eliminated at the equations of motion level. Particularly, a…
Cosmological singularities in interacting dark energy models with an parametrization
Emilio Elizalde, Martiros Khurshudyan, Shin'ichi Nojiri
Future singularities arising in a family of models for the expanding Universe, characterized by sharing a convenient parametrization of the energy budget in terms of the decelerati…
Effects of modified gravity on the turnaround radius in cosmology
Shin'ichi Nojiri, Sergei D. Odintsov, Valerio Faraoni
We revisit the concept of turnaround radius in cosmology, in the context of modified gravity. While preliminary analyses were limited to scalar-tensor/ gravity, we extend the…
On the propagation of gravitational waves in strong magnetic fields
Kazuharu Bamba, Shin'ichi Nojiri, Sergei D. Odintsov
The propagation of gravitational waves is explored in the cosmological context. It is explicitly demonstrated that the propagation of gravitational waves could be influenced by the…
The role of energy conditions in cosmology
Salvatore Capozziello, Shin'ichi Nojiri, Sergei D. Odintsov
Energy conditions can play an important role in defining the cosmological evolution. Specifically acceleration/deceleration of cosmic fluid, as well as the emergence of Big Rip sin…