Abstract
We analyse the geometrical structure of supersymmetric solutions of type II supergravity of the form 1,9−n×M n with non-trivial NS flux and dilaton. Solutions of this type arise naturally as the near-horizon limits of wrapped NS fivebrane geometries. We concentrate on the case d=7, preserving two or four supersymmetries, corresponding to branes wrapped on associative or SLAG three-cycles. Given the existence of Killing spinors, we show that M 7 admits a G 2-structure or an SU(3)-structure, respectively, of specific type. We also prove the converse result. We use the existence of these geometric structures as a new technique to derive some known and new explicit solutions, as well as a simple theorem implying that we have vanishing NS three-form and constant dilaton whenever M 7 is compact with no boundary. The analysis extends simply to other type II examples and also to type I supergravity.
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R.H. Dijkgraaf
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Gauntlett, J., Martelli, D., Pakis, S. et al. G-Structures and Wrapped NS5-Branes. Commun. Math. Phys. 247, 421–445 (2004). https://doi.org/10.1007/s00220-004-1066-y
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DOI: https://doi.org/10.1007/s00220-004-1066-y