[ExI] ligo again: was: RE: puzzling

[Dan TheBookMan]

On Thu, Oct 22, 2020 at 3:06 AM Stuart LaForge via extropy-chat
<extropy-chat at lists.extropy.org> wrote:
> Perhaps dark matter is composed of both WIMPs and MACHOs. LIGO is
> showing black holes are far more common than we thought and they could
> comprise a good fraction of the total mass of our local bubble
> universe. It seems to me that the arms of spiral galaxies rotate at
> the same rate as the central disk because they are shepherded by
> LIGO-detectable massed black holes, like Saturn's rings are shepherded
> by moons.

Is that last point something you've expanded on anywhere? It sounds
like it would make an interesting model (or set of models) that could
lead to testable predictions -- in particular where to look (evidence
of) for shepherd black holes. And not just using LIGO.

Regards,

Dan
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