Data di Pubblicazione:
2015
Citazione:
BLACK HOLE DYNAMICS IN GENUINE AND FAKE GAUGED SUPERGRAVITY / S. Chimento ; tutor: D. Klemm ; coordinatore: M. Bersanelli. DIPARTIMENTO DI FISICA, 2015 Jan 28. 27. ciclo, Anno Accademico 2014. [10.13130/chimento-samuele_phd2015-01-28].
Abstract:
The goal of this thesis is to obtain and study new black hole solutions, both with and without supersymmetry, with a particular focus on multi-centered black holes in a cosmological background.
After a review of matter-coupled N=2 gauged supergravity in four dimensions and of the classification of its supersymmetric solutions, a new supersymmetric black hole solution is obtained, which is the first with nontrivial running hyperscalars.
Fake supergravity is a framework that allows to apply the methods used to classify supersymmetric solutions of supergravity also to theories without supersymmetry. A classification of fake supersymmetric solutions of a theory related to N=2, d=4 gauged supergravity is reviewed and used to construct dynamical solutions representing multiple black holes in a Friedmann-Lemaître-Robertson-Walker background. The physical properties of the single-centered case are then studied in some detail. More complicated solutions with rotation and NUT-charge, or with curved spatial slices, are obtained for a less general class of theories.
Finally a recipe to obtain multi-centered black holes in an arbitrary FLRW universe and in arbitrary dimension is presented. These spacetimes are a multi-centered generalization of the charged McVittie black hole and are sourced by a U(1) gauge field and by a charged perfect fluid. As a particular subcase, these solutions describe an arbitrary number of black holes in a background that is locally anti-de Sitter space in cosmological coordinates. Some physical properties of the single-centered asymptotically AdS black hole are studied, showing in particular that a generalized first law of black hole dynamics is satisfied.
Tipologia IRIS:
Tesi di dottorato
Keywords:
black holes in string theories; black holes; supergravity models; classical theories of gravity; gauge-gravity correspondence
Elenco autori:
S. Chimento
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