The dynamical heating effect of binary star systems works to prevent an initial core collapse of the cluster. When a star passes near a binary system, the orbit of the latter pair tends to contract, releasing energy. Only after this primordial supply of energy is exhausted can a deeper core collapse proceed. In contrast, the effect of tidal shocks as a globular cluster repeatedly passes through the plane of a spiral galaxy tends to significantly accelerate core collapse.
The dynamical heating effect of binary star systems works to prevent an initial core collapse of the cluster When a star passes near a binary system the orbit of the latter pair tends to contract releasing energy Only after this primordial supply of energy is exhausted can a deeper core collapse proceed In contrast the effect of tidal shocks as a globular cluster repeatedly passes through the plane of a spiral galaxy tends to significantly accelerate core collapse