Federico García

Structure of neutron stars in R-squared gravity

The effects implied for the structure of compact objects by the modification of General Relativity (GR) produced by the generalization of the Lagrangian density to the form

On the origin of the jet-like radio/X-ray morphology of G290.1–0.8

f(R)=R+\alpha R^2

Charged Proca stars

, where

Magnetised accretion discs in Kerr spacetimes

R

Detailed study of SNR G306.3−0.9 using XMM-Newton and Chandra observations

is the Ricci curvature scalar, have been recently explored. It seems likely that this squared-gravity may allow heavier Neutron Stars (NSs) than GR. In addition, these objects can be useful to constrain free parameters of modified-gravity theories. The differences between alternative gravity theories are enhanced in the strong gravitational regime. In this regime, because of the complexity of the field equations, perturbative methods become a good choice to treat the problem. Following previous works in the field, we performed a numerical integration of the structure equations that describe NSs in