The D8-brane tied up: string and brane solutions in massive type IIA supergravity

We present two new solutions of Romans' massive type IIA supergravity chara cterized by the two non-trivial massive potentials of Romans' theory: the N SNS 2-form and the RR 7-form. They can he interpreted respectively as the i ntersection of a fundamental string and a D8-brane over a D0-brane and the intersection of a D6-brane with a D8-brane over a NSNS5-brane. The D8-brane manifests itself through the mass parameter and in the massless limit one recovers the standard fundamental string and D6-brane solutions. Although t hese solutions do not have the usual form for BPS bound states at threshold and each of them involves 3 objects, both of them preserve 1/4 of the supe rsymmetries. (C) 1999 Elsevier Science B.V. All rights reserved.