Galaxy study hints at cracks in dark matter theories

Galaxy study hints at cracks in dark matter theories - space - 30
September 2009 - New Scientist
"Since dark matter does not radiate light, astronomers infer its
distribution by looking at how a galaxy's gas and stars are moving.
Previous studies have suggested that dark matter must be uniformly
distributed within a galaxy's central region – a confounding result
since the dark matter's gravity should make it progressively denser
towards a galaxy's centre.

Now, the tale has taken a deeper turn into the unknown, thanks to an
analysis of the normal matter at the centres 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."
http://www.newscientist.com/article/...ef=online-news