Measuring bias - 1: CMB

The problem: do galaxies trace mass? dn/n = b dr/r

Take mass s8 from CMB (scalar fit) and apparent (redshift-space) s8 from 2dFGRS P(k):

b(1.9L*) = (1.00 ± 0.09) exp[-t + 0.5(n-1)]

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