184 citations · 1.2k across the 55 of their papers we have counts for
13 papers · 1 filter
Where the Gauss--Bonnet coupling enters the Bondi--Sachs hierarchy
Maickol Muñoz-Palma, Alvaro Restuccia, Francisco Tello-Ortiz
We integrate the Bondi--Sachs hierarchy of scalar--Gauss--Bonnet gravity with an arbitrary coupling function and a radiating massless scalar, and determine the first order i…
On-shell Homogeneous Curvature Modes in Quadratic Cosmology
Francisco Tello-Ortiz, B. Mishra, Y. Gómez-Leyton +1
5We study homogeneous cosmological perturbations in the quadratic model . Linearization of the modified Friedmann equation together with dust…
Black hole and wormhole branches in gravitational decoupling
Francisco Tello-Ortiz, Y. Gomez-Leyton, Vitalii Vertogradov +1
Minimal Geometric Deformation (MGD) applied to a static Schwarzschild black hole seed generates a single decoupler function , obtained by solving the -sector field equatio…
Mass inflation or scalaron rigidity: Cauchy horizons in metric f(R)
Francisco S. N. Lobo, Maickol Muñoz-Palma, Francisco Tello-Ortiz
We develop a double-null framework for Cauchy-horizon dynamics in metric gravity that separates ordinary mass inflation from scalaron cancellation and genuine escape from th…
Area-product universality in multi-horizon black hole entropy
Francisco Tello-Ortiz, Y. Gómez-Leyton, Jean Báez Cuevas +1
Black-hole entropy and multi-horizon area-product relations represent two apparently distinct manifestations of universality, arising respectively from microscopic statistics and c…
Gravitational Wave Standard Sirens as Probes of Lorentz Violation in Bumblebee Gravity
Ayan Banerjee, Bobur Turimov, Francisco Tello-Ortiz +2
Gravitational-wave standard sirens provide a direct measurement of luminosity distance and therefore offer a new way to test gravity over cosmological scales. We use this idea to f…
Horizon-regular cross-focusing and inner-horizon obstructions in spherical f(R) gravity
Maickol Muñoz-Palma, Francisco S. N. Lobo, Jean Báez Cuevas +1
We formulate a horizon-regular double-null criterion for regular inner marginal horizons in spherically symmetric metric gravity. Using normalized outgoing and ingoing radia…
Scalaron-modified null focusing and radial monotonicity in static f(R) gravity
Maickol Muñoz-Palma, Francisco S. N. Lobo, Jean Báez Cuevas +1
We derive an exact radial monotonicity law for static, spherically symmetric spacetimes in metric \(f(R)\) gravity. For \(ds^2=A(r)dt^2-dr^2/B(r)-r^2dΩ^2\), the matter contribution…
Regular black holes with Minkowskian cores: causal structure and observational degeneracy
Francisco Tello-Ortiz, Y. Gómez-Leyton, Alejandro Rueda +2
We construct a new family of asymptotically flat static and rotating regular black holes characterized by a Minkowskian core and a finite two-horizon structure. The solutions are o…
Field Sources for Dark Matter Black Holes
G. Alencar, C. R. Muniz, Francisco Tello-Ortiz
We investigate the field-theoretic realization of regular black holes sourced by dark matter halo profiles within nonlinear electrodynamics (NED) minimally coupled to gravity. Star…
Horizon formation from effective matter profiles in static spacetimes
Pablo León, G. Alencar, Manuel Gonzalez-Espinoza +1
The formation of event horizons is traditionally studied as the endpoint of gravitational collapse, where the matter distribution and the spacetime geometry are evolved simultaneou…
Non-Schwarzschild black holes sourced by scalar-vector fields
Manuel Gonzalez-Espinoza, Y. Gómez-Leyton, Z. Stuchlik +1
In this work, we construct a static and spherically symmetric black hole solution sourced by a nonlinear scalar-vector sector within the framework of the Minimal Geometric Deformat…
Kaniadakis Holographic Dark Energy: UVIR Duality, Horizon Thermodynamics and Cosmological Constraints
Manuel Gonzalez-Espinoza, Samuel Lepe, Joel F. Saavedra +1
We investigate the cosmological and thermodynamic implications of holographic dark energy derived from the Kaniadakis deformation of the Bekenstein--Hawking entropy. In a spatially…