Natxo Alonso-Alberca

Natxo Alonso-Alberca
Universidad Autónoma de Madrid | UAM

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7
Publications
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220
Citations

Publications

Publications (7)
Article
Full-text available
Performing a Scherk-Schwarz dimensional reduction of D = 11 supergravity on a three-dimensional group manifold we construct five D = 8 gauged maximal supergravities whose gauge groups are the three-dimensional (non-)compact subgroups of SL(3,). These cases include the Salam-Sezgin SO(3) gauged supergravity. We construct the most general half-supers...
Article
We review the definition of (maximally supersymmetric) vacuum in supergravity theories, the currently known vacua in arbitrary dimensions and how the associated supersymmetry algebras can be found. (Invited talk at the Spanish Relativity Meeting (``EREs'') 2002, Mao, Menorca, September 21-23 2002.)
Article
We show how massive/gauged maximal supergravities in 11-n dimensions with SO(n-l,l) gauge groups (and other non-semisimple subgroups of Sl(n,R)) can be systematically obtained by dimensional reduction of ``massive 11-dimensional supergravity''. This series of massive/gauged supergravities includes, for instance, Romans' massive N=2A,d=10 supergravi...
Article
The so-called “massive 11-dimensional supergravity” theory gives, for one Killing vector, Romans' massive 10-dimensional supergravity in 10 dimensions, for two Killing vectors an multiplet of massive 9-dimensional supergravity theories that can be obtained by standard generalized dimensional reduction type IIB supergravity and has been shown to con...
Article
Full-text available
We construct a model for dilatonic brane worlds with constant curvature on the brane, i.e. a non-zero four-dimensional cosmological constant, given as a function of the dilaton coupling and the cosmological constant of the bulk. We compare this family of solutions to other known dilatonic domain wall solutions and apply a self-tuning mechanism to c...
Article
Full-text available
We extend the topological Kerr-Newman-adS solutions by including NUT charge and find generalizations of the Robinson-Bertotti solution to the negative cosmological constant case with different topologies. We show how all of these solutions can be obtained as limits of the general Plebanski-Demianski solution. We study the supersymmetry properties o...
Article
We present warped metrics which solve Einstein equations with arbitrary cosmological constants in both in upper and lower dimensions. When the lower-dimensional metric is the maximally symmetric one compatible with the chosen value of the cosmological constant, the upper-dimensional metric is also the maximally symmetric one and there is maximal un...

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