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- W3025375036 abstract "This thesis is divided in two parts, each one addressing problems that can be relevant in the study of compact objects. The first part deals with the study of a magnetized and self-gravitating gas of degenerated fermions (electrons and neutrons) as sources of a Bianchi-I space-time. We solve numerically the Einstein-Maxwell field equations for a large set of initial conditions of the dynamical variables. The collapsing singularity is isotropic for the neutron gas and can be anisotropic for the electron gas. This result is consistent with the fact that electrons exhibit a stronger coupling with the magnetic field, which is the source of anisotropy in the dynamical variables. In the second part we calculate the entropy of extremal black holes in 4 and 5 dimensions, using the entropy function formalism of Sen and taking into account higher order derivative terms that come from the complete set of Riemann invariants. The resulting entropies show the deviations from the well know Bekenstein-Hawking area law." @default.
- W3025375036 created "2020-05-21" @default.
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- W3025375036 date "2011-03-01" @default.
- W3025375036 modified "2023-09-28" @default.
- W3025375036 title "Gravitational collapse and entropy of Black Holes with magnetic sources" @default.
- W3025375036 hasPublicationYear "2011" @default.
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