  We study the structure and phase behavior of a binary mixture where one of
the components is self-propelling in nature. The inter-particle interactions in
the system were taken from the Asakura-Oosawa model, for colloid-polymer
mixtures, for which the phase diagram is known. In the current model version
the colloid particles were made active using the Vicsek model for
self-propelling particles. The resultant active system was studied by molecular
dynamics methods and integral equation theory. Both methods produce results
consistent with each other and demonstrate that the Vicsek model based activity
facilitates phase separation, thus broadening the coexistence region.
