Cinzia Di Porto, Luca Amendola, Enzo Branchini
In this paper we point out that redshift surveys can break the degeneracy
between the galaxy bias, the power spectrum normalization, \sigma_{8,0} and the
growth factor, without the need for external information by using a simple and
rather general parameterization for the growth rate, the well known
\gamma-parameterization. We find that in next-generation surveys like Euclid
\sigma_{8,0} and \gamma can be measured to within 1%, 5%, respectively, while
the bias b(z) can be measured to within 1-2% in every redshift bin.
View original:
http://arxiv.org/abs/1201.2455
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