Supergravity Supertubes

Abstract

We find the supergravity solution sourced by a supertube: a (1/4)-supersymmetric D0-charged IIA superstring that has been blown up to a cylindrical D2-brane by angular momentum. The supergravity solution captures all essential features of the supertube, including the D2-dipole moment and an upper bound on the angular momentum: violation of this bound implies the existence of closed timelike curves, with a consequent ghost-induced instability of supertube probes.

v1: 1+16 pages, JHEP LaTeX; v2: Substantial revision (1+25 pages), with additional co-author. The asymptotic solution of the earlier version is extended to a solution displaying all essential features of the worldvolume supertube, including the tubular interior structure and the angular momentum bound