3.9k citations · 23.3k across the 206 of their papers we have counts for
208 papers
Isotropic universes with a preferred direction
Jose Beltrán Jiménez, Shinji Tsujikawa
We present a class of cosmological scenarios in which a preferred spatial direction in the matter sector coexists with an exactly homogeneous and isotropic Friedmann--Lema\^ıtre--R…
Probing the signature of axions through the quasinormal modes of black holes
Antonio De Felice, Shinji Tsujikawa
The axion-photon coupling allows the existence of a magnetically and electrically charged black hole (BH) solution endowed with a pseudo-scalar hair. For the Reissner-Nordstrom BH…
Can we distinguish black holes with electric and magnetic charges from quasinormal modes?
Antonio De Felice, Shinji Tsujikawa
We compute the quasinormal modes of static and spherically symmetric black holes (BHs) with electric and magnetic charges. For the electrically charged case, the dynamics of pertur…
Observational constraints on interactions between dark energy and dark matter with momentum and energy transfers
Xiaolin Liu, Shinji Tsujikawa, Kiyotomo Ichiki
We place observational constraints on a dark energy (DE) model in which a quintessence scalar field is coupled to dark matter (DM) through momentum and energy exchanges.The mom…
Starobinsky inflation with a quadratic Weyl tensor
Antonio De Felice, Ryodai Kawaguchi, Kotaro Mizui +1
In Starobinsky inflation with a Weyl squared Lagrangian , where is a coupling constant, we study the linear stability of cosmological perturbations on a spatially flat F…
Excluding static and spherically symmetric black holes in Einsteinian cubic gravity with unsuppressed higher-order curvature terms
Antonio De Felice, Shinji Tsujikawa
Einsteinian cubic gravity is a higher-order gravitational theory in which the linearized field equations of motion match Einstein's equations on a maximally symmetric background. T…