http://www.newscientist.com/article/dn17892
I favor the latter explanation...Dark matter is either weirder than we thought or does not exist at all, a new study suggests.
...the tale has taken a deeper turn into the unknown, thanks to an analysis of the normal matter at the centers of 28 galaxies of all shapes and sizes. The study shows that there is always five times more dark matter than normal matter where the dark matter density has dropped to one-quarter of its central value.
So, it seems Dark Matter's theoretical weirdness is either going to get weirder or collapse under its own weight.The finding goes against expectations because the ratio of dark to normal matter should depend on the galaxy's history – for example, whether it has merged with another galaxy or remained isolated during its entire existence. Mergers should skew the ratio of dark to normal matter on an individual basis.
"There is absolutely no rule in physics that explains these results," says study co-author Hong Sheng Zhao of the University of St Andrews in the UK.
Time to revisit Peratt's PIC simulations and tread the "road not taken" back in the time of Zwicky and Rubin.
(Evolution of the Plasma Universe I & II; Anthony Peratt, circa Dec. 1986)
http://plasmascience.net/tpu/downloadsC ... 6TPS-I.pdf
http://plasmascience.net/tpu/downloadsC ... 6TPS-I.pdf
Best,
~Michael Gmirkin