Abstract
We construct five massive deformations of the unique nine-dimensional N = 2 supergravity, each with two parameters. All of these deformations have a higher-dimensional origin via Scherk-Schwarz reduction and correspond to gauged supergravities. The gauge group we encounter are SO(2), SO(1,1) +, R , R + and the unique two-dimensional non-Abelian Lie group C R 1, which consists of scalings and translations in one dimension. We make a systematic search for two classes of vacuum solutions: maximally symmetric solutions with constant scalars and half-supersymmetric domain wall solutions. In the first category we find explicit solutions in the form of (non-supersymmetric) de Sitter space solutions. In the second category we find precisely the three classes of domain wall solutions that were given in an earlier work.
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