2007-11-12

build-up of mass through mergers

I read a few papers today on the build-up of galaxy masses through mergers. The (very constructive) referee on our recent Masjedi et al paper pointed us at some new papers on the subject that find very small amounts of evolution since redshifts around unity. Given cosmic variance and sample sizes, plus uncertainties in K and evolution corrections, nothing is nearly as precise as our direct measure of the accretion rate, so they only confirm our result at the order-of-magnitude level.

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