72 citations · 284 across the 14 of their papers we have counts for
14 papers
Neutron stars in gravity with conserved energy-momentum tensor: Hydrostatic equilibrium and asteroseismology
Juan M. Z. Pretel, Sergio E. Jorás, Ribamar R. R. Reis +1
We investigate the equilibrium and radial stability of spherically symmetric relativistic stars, considering a polytropic equation of state (EoS), within the framework of …
Strongest constraint in gravity: stellar stability
Juan M. Z. Pretel, Sergio E. Jorás, Ribamar R. R. Reis
In the metric approach of theories of gravity, the fourth-order field equations are often recast as effective Einstein equations in the presence of standard matter and a cur…
Massive scalar wave packet emission by a charged Black Hole and Cosmic Censorship Conjecture violation
Rodrigo L. Fernandez, Ribamar R. R. Reis, Sergio E. Jorás
We study the tunneling probability of a massive () uncharged scalar packet out from a near-extremal, static charged black hole (with mass and charge ). We sho…
Neutron star masses in -gravity
Fulvio Sbisà, Pedro O. Baqui, Tays Miranda +2
We address the issue of the existence of inequivalent definitions of gravitational mass in -gravity. We present several definitions of gravitational mass, and discuss the fo…
Top-Hat Spherical Collapse with Clustering Dark Energy. I. Radius Evolution and Critical Contrast Density
D. Herrera, I. Waga, S. E. Jorás
Understanding the influence of dark energy on the formation of structures is currently a major challenge in Cosmology, since it can distinguish otherwise degenerated viable models.…
Pressure effects in the weak-field limit of f(R) = R + alpha R^2 gravity
Fulvio Sbisà, Oliver F. Piattella, Sergio E. Jorás
We investigate the linear regime of f(R) = R + alpha R^2 gravity for static, spherically symmetric and asymptotically flat configurations of matter. We show that, in vacuum and dee…