Lower bound for angular momenta of microstate geometries in five dimensions
arXiv:2106.06962 · doi:10.1103/PhysRevD.104.084022
Abstract
We study the BPS solutions of the asymptotically flat, stationary microstate geometries with bi-axisymmetry and reflection symmetry in the five-dimensional ungauged minimal supergravity. We show that the angular momenta of the microstate geometry with a small number of centers (at least, five centers) have lower bounds, which are slightly smaller than those of the maximally spinning BMPV black hole. Therefore, there exists a certain narrow parameter region such that the microstate geometry with a small number of centers admits the same angular momenta as the BMPV black hole. Moreover, we investigate the dependence of the topological structure of the evanescent ergosurfaces on the magnetic fluxes through the 2-circles between two centers.
arXiv comment27 pages, 12 figures, TTI-MATHPHYS-5, some errors are corrected, to be published in PRD
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