Metric-affine (non-singular) black holes sourced by anisotropic fluids in modified gravity

CECILIA BEJARANO; GONZALO J. OLMO; DIEGO RUBIERA-GARCIA

Jornada; VIII Jornadas CPAN; 2016

Working in a metric-affine (Palatini) framework, we obtain and analyze black hole solutions generated by anisotropic fluids with various equations of state. In particular, we study  the inner structure of the black holes and the geodesic completeness of these spacetimes in the context of f(R) gravity, an extended theory of General Relativity. We find that the standard point-like singularity can be replaced by a wormhole, which makes the spacetime non-singular. This throws further evidence on the fact that the metric-affine formulation in theories beyond General Relativity represents an encouraging approach to tackle the shortcomings posed by classical singularities.