> On 27 Sep 2018, at 22:27, Brent Meeker <[email protected]> wrote: > > 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?
There are galaxies with strange shape that apparently nobody can explain, so perhaps … Let me look for an example. Ah … the Burçin Mutlu-Pakdil galaxy: https://www.youtube.com/watch?v=uv5-hIif7BQ Not sure how much hard it would be to detect a dark matter disk, but that should not be impossible. I would try this on those strange looking one. Bruno > > 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 >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Everything List" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected] >> <mailto:[email protected]>. >> To post to this group, send email to [email protected] >> <mailto:[email protected]>. >> Visit this group at https://groups.google.com/group/everything-list >> <https://groups.google.com/group/everything-list>. >> For more options, visit https://groups.google.com/d/optout >> <https://groups.google.com/d/optout>. > > > -- > You received this message because you are subscribed to the Google Groups > "Everything List" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected] > <mailto:[email protected]>. > To post to this group, send email to [email protected] > <mailto:[email protected]>. > Visit this group at https://groups.google.com/group/everything-list > <https://groups.google.com/group/everything-list>. > For more options, visit https://groups.google.com/d/optout > <https://groups.google.com/d/optout>. -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
