Quote Originally Posted by factotum View Post
I'm not sure there's any such thing as a neutron star that doesn't spin, given conservation of angular momentum means they have to be spinning much faster than the star they collapsed from. Is there such a thing as a non-rotating star?
Probably not. I have a half remembered memory that pulsar timing caps out at some point. I'm not sure if that is because the oldest pulsars haven't had time to slow down past that point or if neutron stars that spin more slowly than that rate aren't pulsars.