Supertubes and special holonomy

We obtain a \(\frac 14\)-supersymmetric 6-brane solution of IIA Supergravity by T-dualizing the supertube recently found. The resulting \(C_{\it 1}\) electric charge is related to the original \(D0\)-brane charge. The uplifted solution to eleven dimensions results to be a purely geometrical configuration, which can be interpreted as a bound state of a Taub-NUT space and a pp-wave. Being the non trivial part of the metric pseudo-Riemannian, the resulting reduced holonomy group is non-compact and locally isomorphic to a semidirect product of an Abelian four dimensional group and SU(2).