LATE FORMATION OF QUARK STARS AND THEIR POSSIBLE SURVIVAL

We have studied the late formation of quark stars at a temperature muc h lower than the quark-hadron phase transition temperature by calculat ing the rate of formation of hadron bubbles for interacting quark gluo n plasma and hadron gas and by incorporating the effect of curvature e nergy. This is essential to resolve the horizon problem as well as the survivability of these objects. We find that a small change in surfac e tension results in a large variation in the size and mass of these o bjects and a mass of the order of 10(-5) to one solar mass requires a rather large value of the surface tension.