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19932026
most citedBounds on the basic physical parameters for anisotropic compact general relativistic objects

377 citations

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53 papers · 1 filter

gr-qc2025★ 1 cited

Linear stability of nonrelativistic Proca stars

Emmanuel Chávez Nambo, Galo Diaz-Andrade, Alberto Diez-Tejedor +3

We study the linear stability of nonrelativistic Proca stars under generic perturbations. Using a combination of analytic and numerical methods, we demonstrate that, as expected, t…

gr-qc2025★ 2 cited

Compact stars in Einstein-scalar-Gauss-Bonnet gravity: regular and divergent scalar field configurations

Roberto D. Alba Q., Javier Chagoya, Armando A. Roque

We investigate static, spherically symmetric solutions in Einstein-scalar-Gauss-Bonnet gravity non-minimally coupled to a massless real scalar field, both in vacuum and in the pres…

gr-qc2025★ 2 cited

Signatures of cubic gravity in the strong regime

Flavio C. Sánchez, Armando A. Roque, Javier Chagoya

We investigate the effects of Einsteinian cubic gravity in the strong gravitational regime. In the first part, we explore analytical solutions for a static, spherically symmetric m…

gr-qc2024

Stability analysis of geodesics in dynamical Chern-Simons black holes: a geometrical perspective

Tonatiuh Tiscareño, Benito Rodríguez, Javier Chagoya

We apply the Kosambi-Cartan-Chern theory to perform an extensive examination of Jacobi stability of geodesics around rotating black hole solutions to dynamical Chern-Simons gravity…

gr-qc2024★ 2 cited

Nonrelativistic Proca stars: Spherical stationary and multi-frequency states

Emmanuel Chávez Nambo, Alberto Diez-Tejedor, Edgar Preciado-Govea +2

In this paper we follow an effective theory approach to study the nonrelativistic limit of a selfgravitating and selfinteracting massive vector field. Our effective theory is chara…

gr-qc2024★ 2 cited

Quantum Black Hole as a Harmonic Oscillator from the Perspective of the Minimum Uncertainty Approach

Wilfredo Yupanqui Carpio, Octavio Obregón

Starting from the eigenvalue equation for the mass of a black hole derived by Mäkelä and Repo, we show that, by reparametrizing the radial coordinate and the wave function, it can…

gr-qc2024★ 8 cited

On the linear stability of nonrelativistic selfinteracting boson stars

Emmanuel Chávez Nambo, Alberto Diez-Tejedor, Armando A. Roque +1

In this paper we study the linear stability of selfinteracting boson stars in the nonrelativistic limit of the Einstein-Klein-Gordon theory. For this purpose, based on a combinatio…

gr-qc2023★ 8 cited

Are nonrelativistic ground state -boson stars only stable for and ?

Emmanuel Chávez Nambo, Armando A. Roque, Olivier Sarbach

In previous work we analyzed the linear stability of non-relativistic -boson stars with respect to radial modes and showed that ground state configurations are stable with re…

gr-qc2023★ 8 cited

Total light bending in non-asymptotically flat black hole spacetimes

Flavio C. Sánchez, Armando A. Roque, Benito Rodríguez +1

The gravitational deflection of light is a critical test of modified theories of gravity. A few years ago, Gibbons and Werner introduced a definition of the deflection angle based…

gr-qc2023★ 13 cited

Cosmological fluids in the equivalence between Rastall and Einstein gravity

Javier Chagoya, López-Domínguez, C. Ortiz

Rastall gravity is a modified gravity proposal that incorporates a non-conserved energy momentum tensor (EMT). We study the equivalence between Rastall gravity and general relativi…

gr-qc2023★ 13 cited

On the radial linear stability of nonrelativistic -boson stars

Armando A. Roque, Emmanuel Chávez Nambo, Olivier Sarbach

We study the linear stability of nonrelativistic -boson stars, describing static, spherically symmetric configurations of the Schrödinger-Poisson system with multiple wave fu…

gr-qc2022★ 3 cited

Vector-tensor gravity from a broken gauge symmetry

Javier Chagoya, M. Sabido, A. Silva-García

In this paper we present a Yang-Mills type gauge theory of vector-tensor gravity, where the tetrad, the spin connection and vector field are identified with components of the gauge…

gr-qc2022★ 10 cited

Cosmological Boundary Flux Parameter

Rafael Hernández-Jiménez, Claudia Moreno, Mauricio Bellini +1

The {\it{Cosmological Boundary Flux Parameter}} is a novel proposal that attempts to explain the origin of the cosmological parameter purely by geometric nature. Then we implem…

gr-qc2022★ 2 cited

Can a tensorial analogue of gravitational force explain away the galactic rotation curves without dark matter?

Ram Gopal Vishwakarma

The dark matter problem is one of the most pressing problems in modern physics. As there is no well-established claim from a direct detection experiment supporting the existence of…

gr-qc2021★ 17 cited

Horndeski stars

Juan Barranco, Javier Chagoya, Alberto Diez-Tejedor +2

We establish the existence of time-dependent solitons in a modified gravity framework, which is defined by the low energy limit of theories with a weakly broken galileon symmetry a…

gr-qc2021★ 2 cited

On phenomenological parametrizations for the luminosity distance of gravitational waves

Andrés Lizardo, Javier Chagoya, C. Ortiz

The propagation of gravitational waves offers new possibilities for testing the theory of gravity. Amongst these possibilities there is the luminosity distance of gravitational wav…

gr-qc2021★ 18 cited

Lanczos potential of Weyl field: interpretations and applications

Ram Gopal Vishwakarma

An attempt is made to uncover the physical meaning and significance of the obscure Lanczos tensor field which is regarded as a potential of the Weyl field. Despite being a fundamen…

gr-qc2020★ 7 cited

Surface Tension: Accelerated Expansion, Coincidence Problem & Hubble Tension

C. Ortiz

In this paper we give a physical explanation to the accelerated expansion of the Universe, alleviating the tension between the discrepancy of Hubble constant measurements. By the E…

gr-qc2020

A New Weyl-like Tensor of Geometric Origin

Ram Gopal Vishwakarma

A set of new tensors of purely geometric origin have been investigated, which form a hierarchy. A tensor of a lower rank plays the role of the potential for the tensor of one rank…

gr-qc2020

Relativistic potential of Weyl: a gateway to quantum physics in the presence of gravitation?

Ram Gopal Vishwakarma

The well-noted correspondence between gravitation and electrodynamics emphasizes the importance of the Lanczos tensor -- the potential of the Weyl tensor -- which is an inherent st…

gr-qc2020★ 20 cited

Strong lensing by DHOST black holes

Javier Chagoya, C. Ortiz, Benito Rodríguez +1

The deflection of light in the strong field limit is an important test for alternative theories of gravity. However, solutions for the metric that allow for analytic computations a…

gr-qc2020★ 3 cited

Linear perturbations spectra for dynamical dark energy inspired by modified gravity

Celia Escamilla-Rivera, A. Hernández-Almada, Miguel A. García-Aspeitia +1

In this paper, we study a particular modified gravity Equation of State, the so-called Jaime-Jaber-Escamilla, that emerges from the first gravity modified action principle and can…

gr-qc2020★ 6 cited

Gravitational waves in braneworlds after multi-messenger events

Miguel A. García-Aspeitia, Celia Escamilla-Rivera

The GW170817 event opened a new window to test modifications to General Relativity with the aim of discard or impose strong constraints in extra dimension theories of gravity. Conc…

gr-qc2019★ 16 cited

Compact objects in unimodular gravity

J. A. Astorga-Moreno, Javier Chagoya, J. C. Flores-Urbina +1

Unimodular gravity provides a theoretical framework that allows for non-conservation of energy-momentum, with possible implications for the cosmological constant problem. It is the…