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April 20, 2014

Homework Help: Cosmology

Posted by C on Friday, March 1, 2013 at 7:56am.

What explains the observation that galaxy clustering is stronger at higher redshifts, which is an apparent reversal of the trend out to about z ~ 1?
It is difficult to measure peculiar velocities
Rich clusters have more galaxies than poor clusters
Density contrast seems to grows in time
At higher redshifts, galaxies become very biased tracers of mass

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