Wess-Zumino actions for IIA D-branes and their supersymmetries

We present Wess-Zumino actions for general IIA Dp-branes in explicit forms. We perform the covariant and irreducible separation of the fermionic const raints of IIA Dp-branes into first class and second class. A necessary cond ition which guarantees this separation is discussed. The generators of the local supersymmetry (kappa symmetry) and the kappa algebra are obtained. We also explicitly calculate the conserved charge of the global supersymmetry (SUSY) and the SUSY algebra which contains topological charges. (C) 1998 E lsevier Science B.V.