286 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of ConcepciónCL74 papers
- Pontificia Universidad Católica de ValparaísoCL33 papers
- Universidad Michoacana de San Nicolás de HidalgoMX20 papers
- Federico Santa María Technical UniversityCL19 papers
- Pontificia Universidad Católica de ChileCL15 papers
- Universidad Nacional Autónoma de MéxicoMX15 papers
- University of ChileCL15 papers
- University of La SerenaCL14 papers
- University of Cape TownZA13 papers
- Universidad de Santiago de ChileCL12 papers
- Universidad Católica de la Santísima ConcepciónCL10 papers
- University of ValparaísoCL10 papers
48 papers · 1 filter
Accelerating electrically charged ModMax black hole solutions in gravity
B. Eslam Panah, N. Heidari, A. Rincón
Using the metric in the context of gravity coupled with the ModMax nonlinear electromagnetic field (the ModMax theory), we derive an exact black hole solution in…
Slowly rotating condensate dark stars beyond the mean-field approximation
Grigoris Panotopoulos, Ángel Rincón, Ilidio Lopes
We investigate rotational properties and universal relations of slowly rotating Bose-Einstein condensate dark stars in the context of General Relativity, both at the mean-field lev…
Radial oscillations of quark stars in light of current astrophysical constraints: A comparative study
G. Panotopoulos, A. Rincon, I. Lopes
We investigate the structural and oscillatory properties of isotropic strange quark stars within General Relativity, focusing on three physically motivated equations of state: the…
Black hole physics within gravity: Quasi-normal spectra and greybody factors
Ángel Rincón, Grigoris Panotopoulos
We investigate several astrophysical motivated properties of a four-dimensional black hole solution in the framework of gravity. The model is characterized by a single addit…
Can wormhole spacetimes in Unimodular Gravity be supported by ordinary matter? A general proof of the exotic matter requirement
Mauricio Cataldo, Norman Cruz, Patricio Salgado
We establish a general no--go theorem demonstrating that all traversable wormhole configurations in Unimodular Gravity necessarily require exotic matter. The proof relies solely on…
Cosmology in the presence of diffeomorphism-violating, nondynamical background fields
Carlos M. Reyes, Marco Schreck, Alex Soto
We consider diffeomorphism violation, which is parameterized by nondynamical background fields of the gravitational Standard-Model Extension (SME), and study its effects on the tim…
Hamiltonian formulation of an effective modified gravity with nondynamical background fields
Carlos M. Reyes, Marco Schreck
The current paper is dedicated to developing a (3+1) decomposition for the minimal gravitational Standard-Model Extension. Our setting is explicit diffeomorphism violation and we f…
Thermodynamics of 2+1 dimensional Coulomb-Like Black Holes from Non Linear Electrodynamics with a traceless energy momentum tensor
Mauricio Cataldo, P. A. González, Joel Saavedra +2
In this work we study thermodynamics of 2+1-dimensional static black holes with a nonlinear electric field. Besides employing the standard thermodynamic approach, we investigate th…
An alternative study about the geometry and the first law of thermodynamics for AdS Lovelock gravity, using the definition of conserved charges
Rodrigo Aros, Milko Estrada, Pablo Pereira
In this work it is introduced an extension of the study of the first law of thermodynamics of black holes based on the geometry of the extended phase space for AdS Lovelock graviti…
Modelling the current accelerated expansion of the Universe with Holographic Dark Energy
Carlos Rodriguez-Benites, Mauricio Cataldo, Antonella Cid +1
In this work we explore a Holographic Dark Energy Model in a flat Friedmann-Lemaître-Robertson-Walker Universe, which contains baryons, radiation, cold dark matter and dark energy…
On sign-changeable interaction in FLRW cosmology
Fabiola Arevalo, Antonella Cid, Luis P. Chimento +1
We investigate an interacting two-fluid model in a spatially flat Friedmann-Lemaître-Robertson-Walker (FLRW) Universe, when the energy transfer between these two dark components is…
Emergent Universe by Tunneling in a Jordan-Brans-Dicke Theory
Pedro Labrana, Hobby Cossio
In this work we study an alternative scheme for an Emergent Universe scenario in the context of a Jordan-Brans-Dicke theory, where the universe is initially in a truly static state…
The Hubble IR cutoff in holographic ellipsoidal cosmologies
Mauricio Cataldo, Norman Cruz
It is well known that for spatially flat FRW cosmologies, the holographic dark energy disfavours the Hubble parameter as a candidate for the IR cutoff. For overcoming this problem,…
Static phantom wormholes of finite size
Mauricio Cataldo, Fabian Orellana
In this paper we derive new static phantom traversable wormholes by assuming a shape function with a quadratic dependence on the radial coordinate r. We mainly focus our study on w…
Non-minimally coupled scalar field cosmology with torsion
Antonella Cid, Fernando Izaurieta, Genly Leon +2
In this work we present a generalized Brans-Dicke lagrangian including a non-minimally coupled Gauss-Bonnet term without imposing the vanishing torsion condition. In the resulting…
Finite time future singularities in the interacting dark sector
Mauricio Cataldo, Luis P. Chimento, Martín G. Richarte
We construct a piecewise model that gives a physical viable realization of finite-time future singularity for a spatially flat Friedmann-Robertson-Walker universe within the intera…
Static spherically symmetric wormholes with isotropic pressure
Mauricio Cataldo, Luis Liempi, Pablo Rodríguez
In this paper we study static spherically symmetric wormhole solutions sustained by matter sources with isotropic pressure. We show that such spherical wormholes do not exist in th…
Classically and Quantum stable Emergent Universe from Conservation Laws
Sergio del Campo, Eduardo I. Guendelman, Ramon Herrera +1
It has been recently pointed out by Mithani-Vilenkin that certain emergent universe scenarios which are classically stable are nevertheless unstable semiclassically to collapse. He…
Cosmic anisotropic doomsday in Bianchi type I universes
Mauricio Cataldo, Antonella Cid, Pedro Labraña +1
In order to investigate if the anisotropy of the spacetime may induce future singularities at a finite value of the cosmic time on the evolution of cosmological models, we study va…
Intermediate accelerated solutions as generic late-time attractors in a modified Jordan-Brans-Dicke theory
Antonella Cid, Genly Leon, Yoelsy Leyva
We investigate a Jordan-Brans-Dicke (JBD) scalar field, , with power-law potential in the presence of a second scalar field, , with an exponential potential, in both the Jord…
On the consistency of tachyon warm inflation with viscous pressure
Antonella Cid
We obtain conditions for the existence of an attractor in the system of equations describing a tachyon warm inflationary model with bulk viscosity taken into account. When these co…
Emergent Cosmology, Inflation and Dark Energy
Eduardo Guendelman, Ramón Herrera, Pedro Labraña +2
A new class of gravity-matter models defined in terms of two independent non-Riemannian volume forms (alternative generally covariant integration measure densities) on the space-ti…
Radiation in (2+1)-dimensions
Mauricio Cataldo, Alberto A. García
In this paper we discuss the radiation equation of state in (2+1)-dimensions. In (3+1)-dimensions the equation of state may be used to describe either actual electr…
Accelerated FRW Solutions in Chern-Simons Gravity
Juan Crisostomo, Fernando Gomez, Patricio Salgado +3
We consider a five-dimensional Einstein-Chern-Simons action which is composed of a gravitational sector and a sector of matter, where the gravitational sector is given by a Chern-S…