As predicted, the NASA telecon on Chandra results was on followup studies of the “bullet cluster”.
Press release is here.
Lots of pretty pictures.
“This is the type of result that future theories will have to take into account,” said Sean Carroll, a cosmologist at the University of Chicago.
As opposed to the other type of results?
As I recall there are two types of results: observational and theoretical.
Seriously, the selling point is that they see the baryons in the hot gas (which dominates the normal matter in these clusters – they see the galaxies too, of course, but they don’t mass much), and the auxillary data like lensing shows the mass, dominated by dark matter; and they’re separated, since the gas is not in hydrodynamic equilibrium with the mass.
This could severly curtail alternative gravity theories like MOND, until a future theorist takes it into account and finds a fudge around the resuls.
Lather, Rinse, Repeat.