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Instability of supersymmetric microstate geometries
(SpringerJournal of High Energy Physics, 2016-10-07)
We investigate the classical stability of supersymmetric, asymptotically flat, microstate geometries with five non-compact dimensions. Such geometries admit an “evanescent ergosurface”: a timelike hypersurface of infinite ...
Twisting algebraically special solutions in five dimensions
(Institute of PhysicsClassical and Quantum Gravity, 2016)
We determine the general form of the solutions of the five-dimensional vacuum Einstein equations with cosmological constant for which (i) the Weyl tensor is everywhere type II or more special in the null alignment ...
Evanescent ergosurfaces and ambipolar hyperkähler metrics
(SpringerJournal of High Energy Physics, 2016-04-20)
A supersymmetric solution of 5d supergravity may admit an ‘evanescent ergosurface’: a timelike hypersurface such that the canonical Killing vector field is timelike everywhere except on this hypersurface. The hyperkähler ...