Rotational Instabilities in Post–Collapse Stellar Cores

A core–collapse supernova might produce large amplitude gravitational waves if, through the collapse process, the inner core can aquire enough rotational energy to become dynamically unstable. In this report I present the results of 3-D numerical simulations of core collapse supernovae. These simulations indicate that for some initial conditions the post–collapse inner core is indeed unstable. However, for the cases considered, the instability does not produce a large gravitational–wave signal.