D-BRANES IN CURVED SPACETIME - THE NAPPI-WITTEN BACKGROUND

We find exact D-brane configurations in the Nappi-Witten background us ing the boundary state approach and describe how they are related by T -duality transformations. We also show that the classical boundary con ditions of the associated sigma model correspond to a field dependent automorphism relating the chiral currents and discuss the corresponden ce between the boundary state approach and the sigma model approach.