Maximally supersymmetric G-backgrounds of IIB supergravity Original Research Article

We classify the geometry of all supersymmetric IIB backgrounds which admit the maximal number of G-invariant Killing spinors. For compact stability subgroups image and image, the spacetime is locally isometric to a product image with image, where image is a maximally supersymmetric solution of a n-dimensional supergravity theory and image is a Riemannian manifold with holonomy G. For non-compact stability subgroups, image, image, image, image, image and image, the spacetime is a pp-wave propagating in an eight-dimensional manifold with holonomy K. We find new supersymmetric pp-wave solutions of IIB supergravity.