Hydrodynamical modeling of circularization in close binary systems in early stages of their evolution on the dynamical time scale

摘要

We have carried out three-dimensional hydrodynamical modeling of the process of circularization in close binary systems with fully convective components that are close to filling their Roche lobes. The computations are based on the smooth-particle (SPH) method and were carried out for the case of eccentricities less than 0.1 on the dynamical time scale. We find that the circularization time in such systems should be of the order of hundreds of orbital periods. (c) 2005 Pleiades Publishing, Inc.