Black holes and U-duality

We find the general charged rotating black hole solutions of the maximal supergravities in dimensions 4 less than or equal to D less than or equal to 9 arising from toroidally compactified type II string or M-theories, In each dimension, these are obtained by acting on a generating solution with classical duality symmetries. In D = 4, D = 5 and 6 less than or equal to D less than or equal to 9 the generating solution is specified by the ADM mass, [D-1/2]-angular momentum components and five, three and two charges, respectively. We discuss the BPS-saturated (static) black holes and derive the U-duality invariant form of the area of the horizon, We also comment on the U-duality invariant form of the BPS mass formulae.