(Non-)Abelian gauged supergravities in nine dimensions

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 groups we encounter are SO(2), SO(1, 1)+, R, R+ and the unique two–dimensional non–Abelian Lie group CR1, 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.