8 papers
corrections to self-dual gravitational instantons
José Luis V. Cerdeira, Cristóbal Corral, Tomás OrtÃn
We study the corrections to self-dual gravitational instantons in the context of the four-dimensional Cano--Ruipérez action, which can be obtained by the compactification of…
Hadronic lensing
Fabrizio Canfora, Cristóbal Corral, Borja Diez
We introduce an analytic approach to study gravitational lensing in the presence of a distribution of hadrons. The situation is analogous to the propagation of photons in a medium…
Planar AdS multi-NUT spacetimes and Kaluza-Klein multi-monopoles
Cristóbal Corral, Cristián Erices, Daniel Flores-Alfonso +1
In higher-dimensional Einstein-AdS gravity, it is well known that planar and static anti-de Sitter black holes can be endowed with multiple rotation parameters via a large-gauge tr…
Nonconformally Ricci-flat instantons in Conformal Gravity with and without nonlinear matter fields
Cristóbal Corral, Borja Diez, Eleftherios Papantonopoulos
In this work, we study nonconformally Ricci-flat gravitational instantons in four-dimensional Conformal Gravity, both in vacuum and in the presence of nonlinear conformal matter. F…
Renormalization of Einstein-Gauss-Bonnet AdS gravity
Giorgos Anastasiou, Ignacio J. Araya, Avik Chakraborty +2
The asymptotic analysis for the metric of a generic solution of Einstein-Gauss-Bonnet AdS theory is provided by solving the field equations in the Fefferman-Graham frame. Using sta…
Self-dual instantons and gravitating dyons in non-Abelian ModMax theory
Fabrizio Canfora, Cristóbal Corral, Borja Diez +2
Motivated by the recent interest in conformal and duality invariant nonlinear electrodynamics, we study the non-Abelian extension of ModMax electrodynamics. The theory is parameter…