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Fig. 2

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Impact of non-linear clustering on the measurement and theoretical modelling of the galaxy clustering ratio η. The latter is measured in real space for the halo catalogues of the Bh simulation and compared to both the linear and non-linear predictions, as described respectively by a simple Eisenstein & Hu (1998) linear power spectrum (dot-dashed lines) and after correction through the non-linear HALOFIT prescription of Smith et al. (2003) (solid lines). The clustering ratio is shown as a function of the smoothing scale R adopted to filter the discrete distribution of haloes and for various correlation lengths (r = nR) with n =  { 2,3,4 }. Errors bars are obtained using 64 block-jackknife resampling of the data which excludes a cubic volume of linear size 250   h-1   Mpc each time.

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