On exact Kerr-Schild type vacuum solutions to Salam's two-tensor theory of gravity

A Kerr-Schild type ansatz for thef andg tensor fields leads to a tractable form of the field equations of Salam's two-tensor theory of gravity in vacuo. While the general solution contains the Schwarzschild and Kerr metrics in the pure Einstein vacuum case, we can show in thef-g case that all non-trivial (fg) solutions are restricted to have the form of plane-fronted waves.Supported by Fonds zur Förd. d. wiss. Forsch. in Österr., Nr. 1255.