The more correct term is angular momentum. There are 'mechanisms' that can slow the angular momentum. Angular momentum is conserved, and as the star collapses f

The more correct term is angular momentum. There are 'mechanisms' that can slow the angular momentum. Angular momentum is conserved, and as the star collapses from the original total mass/radius to its new much lower radius, resulting in a high spin rate. At some point the angualar momentum (or centrifugal force) perhaps will fall to some critical value where the star collapse further. I think this would be a valuable event in terms of figuring out the equation of state and the related unanswered questios the PO mentioned? It's been years since I studied phyisics at uni.... astronomy was always me fav.