Black holes and membranes in AdS(7)

We investigate maximal gauged supergravity in seven dimensions and some of its solitonic solutions. By focusing on a truncation of the gauged SO(5) R- symmetry group to its U(1)(2) Cartan subgroup, we construct general two cha rge black holes that are asymptotically anti-de Sitter. We demonstrate that 1- and 2-charge black holes preserve 1/2 and 1/4 of the supersymmetries re spectively. Additionally, we examine the odd-dimensional self-duality equat ion governing the three-form potential transforming as the 5 of SO(5), and provide some insight on the construction of membrane solutions in anti-de S itter backgrounds. (C) 1999 Published by Elsevier Science B.V. All rights r eserved.