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In order to address the issues raised by the recent discovery ofnon-uniqueness of black holes in five dimensions, we construct a solution ofstring theory at low energies describing a five-dimensional spinning black ringwith three charges that can be interpreted as D1-brane, D5-brane, and momentumcharges. The solution possesses closed timelike curves (CTCs) and otherpathologies, whose origin we clarify. These pathologies can be avoided bysetting any one of the charges, e.g. the momentum, to zero. We argue that theD1-D5-charged black ring, lifted to six dimensions, describes the thermalexcitation of a supersymmetric D1-D5 supertube, which is in the same U-dualityclass as the D0-F1 supertube. We explain how the stringy microscopicdescription of the D1-D5 system distinguishes between a spherical black holeand a black ring with the same asymptotic charges, and therefore provides a(partial) resolution of the non-uniqueness of black holes in five dimensions.Comment: 33 pages, 1 figur

Black rings, supertubes, and a stringy resolution of black hole non-uniqueness