Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2003-03-31
Class.Quant.Grav.20:4177-4194,2003
Physics
High Energy Physics
High Energy Physics - Theory
28 pages, Latex; minor changes and add references
Scientific paper
10.1088/0264-9381/20/19/304
We obtain a general class of time-dependent, asymptotically de Sitter backgrounds which solve the first order bosonic equations that extremize the action for supergravity with gauged non-compact $R$-symmetry. These backgrounds correspond only to neutral fields with the correct sign of kinetic energy. Within N=2 five-dimensional supergravity with vector-superfields we provide examples of multi-centered charged black holes in asymptotic de Sitter space, whose spatial part is given by a time-dependent hyper-K\"ahler space. Reducing these backgrounds to four dimensions yields asymptotically de Sitter multi-centered charged black hole backgrounds and we show that they are related to an instanton configuration by a massive T-duality over time. Within N=2 gauged supergravity in four (and five)-dimensions with hyper-multiplets there could also be neutral cosmological backgrounds that are regular and correspond to the different de Sitter spaces at early and late times.
Behrndt Klaus
Cvetic Mirjam
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