The dark matter of a galaxy responsible for the flat rotation curve is
presumably in a cloud of spherical orbits around the galaxy. It doesn't
collapse to a disk, as the visible matter does, because being dark it
doesn't radiate away energy via EM in collisions. But it must still
radiate gravitational waves in collisions. Are there estimates of how
long this would take to collapse dark matter to a disk? Are there any
galaxies we can see which are old enough for this to have happened?
Brent
On 9/27/2018 5:00 AM, Philip Thrift wrote:
Someone to perhaps follow, doing #darkmatter theory:
Axel Maas <https://twitter.com/axelmaas>
@axelmaas <https://twitter.com/axelmaas>
Professor for Theoretical Particle Physics at the University of Graz
(Austria). Doing everything from low-energy QCD to
beyond-the-standard-model #np3 <https://twitter.com/hashtag/np3?src=hash>
More
I have published a new blog entry on how a model, which we
investigated for a very different purpose, may actually be a (perhaps
even useful) #darkmatter
<https://twitter.com/hashtag/darkmatter?src=hash> candidate, see
https://axelmaas.blogspot.com/2018/09/unexpected-connections.html…
<https://t.co/XBwoPUsEUP> #np3 <https://twitter.com/hashtag/np3?src=hash>
- pt
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