  Tachyon-Brane inflationary universe model in the context of a Chaplygin gas
equation of state is studied. General conditions for this model to be
realizable are discussed. In the high-energy limit and by using an exponential
potential we describe in great details the characteristic of this model. Recent
observational data from the Wilkinson Microwave Anisotropy Probe experiment are
employed to restrict the parameters of the model.
