Supergravity couplings of noncommutative D-branes

We discuss the supergravity couplings of noncommutative D-branes by conside ring the disk amplitudes with one closed string insertion. The result confi rms a recent proposal for the general form of the noncommutative Yang-Mills operators coupling to the massless closed string modes. The construction i nvolves smearing Yang-Mills field variables along an open Wilson line. For multiple D-branes interacting with background supergravity fields, this pre scription reduces, in the B = 0 limit, to the "symmetrized trace" prescript ion, and the supergravity fields are seen to be functionals of the nonabeli an scalar fields on the branes. (C) 2001 Elsevier Science B.V. All rights r eserved.