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10 papers · 2 filters
Singularity Resolution in Gauged Supergravity and Conifold Unification
J. D. Edelstein, A. Paredes, A. V. Ramallo
We obtain a unified picture for the conifold singularity resolution. We propose that gauged supergravity, through a novel prescription for the twisting, provides an appropriate fra…
Let's Twist Again: General Metrics of G(2) Holonomy from Gauged Supergravity
J. D. Edelstein, A. Paredes, A. V. Ramallo
We construct all complete metrics of cohomogeneity one G(2) holonomy with S^3 x S^3 principal orbits from gauged supergravity. Our approach rests on a generalization of the twistin…
Gravitational Radiation in D-dimensional Spacetimes
Vitor Cardoso, Oscar J. C. Dias, Jose' P. S. Lemos
Gravitational wave solutions to Einstein's equations and their generation are examined in D-dimensional flat spacetimes. First the plane wave solutions are analyzed; then the wave…
Pair of accelerated black holes in an anti-de Sitter background: the AdS C-metric
Oscar J. C. Dias, Jose' P. S. Lemos
The anti-de Sitter C-metric (AdS C-metric) is characterized by a quite interesting new feature when compared with the C-metric in flat or de Sitter backgrounds. Indeed, contrarily…
Tachyonic Inflation in the Braneworld Scenario
M. C. Bento, O. Bertolami, A. A. Sen
We consider cosmological inflation driven by the rolling tachyon in the context of the braneworld scenario. We show that sufficient inflation consistent with the observational cons…
Wrapped branes with fluxes in 8d gauged supergravity
J. D. Edelstein, A. Paredes, A. V. Ramallo
We study the gravity dual of several wrapped D-brane configurations in presence of 4-form RR fluxes partially piercing the unwrapped directions. We present a systematic approach to…