New families of interpolating type IIB backgrounds

Understand

We construct new families of interpolating two-parameter solutions of type IIB supergravity.

• These correspond to D3-D5 systems on non-compact six-dimensional manifolds which are T^2 fibrations over Eguchi-Hanson and multi-center Taub-NUT spaces, respectively.
• One end of the interpolation corresponds to a solution with only D5 branes and vanishing NS three-form flux.
• A topology changing transition occurs at the other end, where the internal space becomes a direct product of the four-dimensional surface and the two-torus and the complexified NS-RR three-form flux becomes imaginary self-dual.