Velocity Fields from IRAS-PSCz survey
E. Branchini, C. S. Frenk L. Teodoro, I. Schmoldt, G. Efstathiou, W. Saunders, S. D. M. White, M. Rowan-Robinson, W. Sutherland, H. Tadros, S. Maddox, S. Oliver, O. Keeble
Abstract
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 PSCz 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 β. We have obtained β=0.6+0.22-0.15 (1-σ), in agreement with other recent determinations.
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