From the 1 of 13 linked papers with an AI index.
13 papers
Static regular black holes in Horndeski theories: analytic no-go and nonanalytic obstructions
Antonio De Felice, Shinji Tsujikawa
The paper analyzes static, spherically symmetric black hole solutions in Horndeski scalar‑tensor theories and shows that generic regular horizons are obstructed by instabilities, l…
A solid unification of the dark sector
Jose Beltrán Jiménez, MarÃa Pérez Garrote, Florencia A. Teppa Pannia +1
We construct a unified description of dark matter and dark energy in terms of a single dark component that behaves as a pressureless fluid in the early Universe and undergoes a tra…
Light rings, gravitational lensing, and ISCOs of exotic compact objects in Einstein-scalar-Maxwell theories
Antonio De Felice, Shinji Tsujikawa
In Einstein-scalar-Maxwell theories with a coupling between the scalar field and the electromagnetic field strength of the form , we investigate the existence of…
Inspiral gravitational waveforms from charged compact binaries with scalar hair
Antonio De Felice, Shinji Tsujikawa
We investigate gravitational waveforms from compact binary systems in Einstein-scalar-Maxwell (ESM) theories, where a scalar field couples to a gauge field throu…
Revisiting observational constraints on coupled exponential quintessence with energy and momentum transfers: degeneracy with massive neutrinos
Jose Beltrán Jiménez, Kiyotomo Ichiki, Xiaolin Liu +2
We investigate the impact of massive neutrinos on cosmological models in which dark energy, described by a quintessence scalar field with an exponential potential, interacts w…
Vector Horndeski black holes in nonlinear electrodynamics
Che-Yu Chen, Antonio De Felice, Shinji Tsujikawa +1
On a spherically symmetric and static background, we study the existence of linearly stable black hole (BH) solutions in nonlinear electrodynamics (NED) with a Horndeski vector-ten…