6 papers
Nonradial oscillations of realistic anisotropic neutron stars: Polar modes
L. M. Becerra, José F. Rodríguez-Ruiz, E. A. Becerra-Vergara +1
In this work, we study the polar perturbations of static, spherically symmetric neutron stars with anisotropic pressure in full general relativity, including linear-order perturbat…
Nonradial oscillations of realistic anisotropic neutron stars: Axial modes
Jose F. Rodriguez-Ruiz, L. M. Becerra, F. D. Lora-Clavijo
Non-radial oscillation modes of neutron stars serve as diagnostics of their internal composition and relativistic structure. In this work, we investigate the perturbations of stati…
Neutron stars in a conservative gravity
Ronaldo V. Lobato, Geanderson A. Carvalho, Carlos E. C. Montaña +1
We investigate a conservative formulation of gravity motivated by a key limitation of several existing approaches: the gravitational function is often reconstructed from a…
Stable colored black holes with quartic self-interactions
Jose F. Rodriguez-Ruiz, Gabriel Gomez
We analytically prove the linear radial stability of non-Abelian black holes with quartic self-interactions. The background, constructed from the Wu-Yang magnetic monopole ansatz,…
Jacobson's thermodynamic approach to classical gravity applied to non-Riemannian geometries: remarks on the simplicity of Nature
Jhan N. Martinez, Jose F. Rodriguez-Ruiz, Yeinzon Rodriguez
Three decades ago, Ted Jacobson surprised us with a very appealing approach to classical gravity. According to him, the gravitational field equations are the consequence of the fir…
Gravitational wave oscillations in Multi-Proca dark energy models
Gabriel Gomez, Jose F. Rodriguez
Gravitational wave oscillations arise from the exchange of energy between the metric perturbations and additional tensor modes. This phenomenon can occur even when the extra degree…