Heterotic Hyper-Kahler Flux Backgrounds

Understand

We study Heterotic supergravity on Hyper-Kahler manifolds in the presence of non-trivial warping and three form flux with Abelian bundles in the large charge limit.

• We find exact, regular solutions for multi-centered Gibbons-Hawking spaces and Atiyah-Hitchin manifolds.
• In the case of Atiyah-Hitchin, regularity requires that the circle at infinity is of the same order as the instanton number, which is taken to be large.
• Alternatively there may be a non-trivial density of smeared five branes at the bolt.