Closed string brane-like states, brane bound states and noncommutative branes

We study the mass and different RR charge distributions of the BPS (p,p−2)-brane bound states in the closed string brane-like σ-model. We show that such brane bound states can be realized by introducing a constant B field in the closed string theory. In addition we show that the worldvolume coordinates of these brane bound states turn out to be noncommutative.