Non-supersymmetric black-hole solutions in N=2,D=4 supergravity

Esta tesis de doctorado se dedica al estudio de los agujeros negros de supergravedad N=2 en cuatro dimensiones. Se concentra principalmente en el ánalisis de soluciones no supersimétricas, extremas y no extremas, a un solo centro o a multi-centro. Se han utilizado y profundizado nociones importantes como el formalismo de primer orden y el formalismo H-FGK. Se han encontrado nuevas soluciones de agujero negro y nuevas simetrías entre las variables del sistemas.This doctoral thesis contains a thorough study of the non-supersymmetric branch of supergravity black holes arising in four-dimensional N=2 theories interacting with abelian vector and scalar fields. It addresses the problem of describing supersymmetric and non supersymmetric, both extremal (also multicentre) and non extremal solutions with a similar formalism, based on first order dynamical equations driven by a superpotential. The new perspective provided by the so called H-FGK formalism and its outcomes are extensively discussed and proposed as a unifying framework