Supergravity Solutions Without Tri-holomorphic U(1) Isometries

TL;DR

This paper constructs new five-dimensional supergravity solutions without tri-holomorphic U(1) isometries, including a novel solution based on a triaxial Bianchi type IX Einstein-hyperkahler base space, expanding the landscape of known solutions.

Contribution

It introduces a class of supergravity solutions lacking tri-holomorphic U(1) symmetry, including a new solution on a Bianchi type IX base space, not reducible to Gibbons-Hawking form.

Findings

Constructed solutions reduce to known solutions in certain limits

Discovered a new solution on a Bianchi type IX base space

Identified a special case related to Eguchi-Hanson geometry

Abstract

We investigate the construction of five-dimensional supergravity solutions that don't have any tri-holomorphic U(1) isometries. We construct a class of solutions that in various limits of parameters reduces to many of previously constructed five-dimensional supergravity solutions based on both hyper-Kahler base spaces that can be put into a Gibbons-Hawking form and hyper-Kahler base spaces that can't be put into a Gibbons-Hawking form. We find a new solution which is over triaxial Bianchi type IX Einstein-hyperkahler base space with no tri-holomorphic U(1) symmetry. One special case of this solution corresponds to five-dimensional solution based on Eguchi-Hanson type II geometry.