Adding new hair to the 3-charge black ring

Motivated by the string theory analysis of Giusto et al (2011 JHEP1111 (2011) 062), we construct a class of 1/8-BPS solutions of type-IIB supergravity compactified on S-1 x T-4. In this duality frame, our ansatz allows for a non-trivial NS-NS B-field, which has been usually set to zero in previous studies of 1/8-BPS geometries. We provide an M-theory description of these new geometries and show that they can be interpreted as the lift of solutions of the N = 25D supergravity with three vector multiplets and whose scalar manifold is the symmetric space SO(1, 1) circle times (SO(1, 2)/SO(2)). Finally, we show that the non-minimal 5D black rings provide an explicit example of solutions falling in this ansatz. In particular, we point out the existence of a black ring that has an extra dipole charge with respect to the solutions of the STU model. In the near-horizon limit, this ring has an AdS(3) x S-3 geometry with the same radius as the one of the 3-charge black hole, and thus, its microstates should belong to the usual D1-D5 CFT.