On Thu, 16 Mar 2017 12:46:58 EDT, wrote:
Is the NET angular momentum of a globular cluster of stars, zero?
... Is the NET angular momentum of an elliptical galaxy and or the
central bulge of a spiral, zero or close to zero

I think the current status of thinking is long on theory and short on
observations. I don't think there's been a single comprehensive
survey of the actual stellar movements in any globular cluster. I'm
not aware of any done for an elliptical galaxy either.

Not long ago there was an idea of "tri-axial" rotation for these which
implied that individual star orbits could be decomposed into 3 axial
components which would somehow serve to keep the stars from plunging
into the core. That doesn't seem to be de rigueur anymore.

Also there was speculation some decades ago that globular cluster
stars simply fell through the cluster cores in a sort of mass yo-yo
action. Also not popular of late, I don't think.

I had a notion which I publicized on these forums some years ago, that
there's a gravitational scalar, as yet unmodelled, which allowed stars
to freely float in such environments. I plead guilty for hand-waving
on this, but it seems an elegant concept. Ugly facts begone!

I mention all this because it looks to me that other answers on this
thread are muddying up the distinction between theory and observation.
If there've been cogent observations made recently on actual stellar
orbits in globular clusters or ellipticals, I'd be glad to be directed
to them.