Velocity Fields from IRAS-PSCz survey

We present a self-consistent nonparametric model of the cosmic velocity field based on the spatial distribution of IRAS galaxies in the recently completed all-sky PSC\(z\) redshift survey. The most streaking feature of the PSCz model velocity field is a coherent large-scale streaming motion along the Perseus Pisces, Local Supercluster, Great Attractor and Shapley Concentration baseline, with no evidence for a backinfall into the Great Attractor region. A likelihood analysis has been performed to measure \(\beta\). We have obtained \(\beta =0.6^{+0.22}_{-0.15}\) (1-\(\sigma\)), in agreement with other recent determinations.