Toric Sasaki-Einstein metrics on S2xS3

We show that by taking a certain scaling limit of a Euclideanised form of the Plebanski-Demianski metrics one obtains a family of local toric Kahler-Einstein metrics. These can be used to construct local Sasaki-Einstein metrics in five dimensions which are generalisations of the Y-p,Y-q manifolds. In fact, we find that these metrics are diffeomorphic to those recently found by Cvetic, Lu, Page and Pope. We argue that the corresponding family of smooth Sasaki-Einstein manifolds all have topology S-2 X S-3. We conclude by setting up the equations describing the warped version of the Calabi-Yau cones, supporting (2, 1) three-form flux. (c) 2005 Elsevier B.V. All rights reserved.