Velocity Fields from IRAS-PSCz survey

Details Velocity Fields from IRAS-PSCz survey Velocity Fields from IRAS-PSCz survey

1998-10-07

arxiv.org/abs/astro-ph/9810106v1

Astronomy and Astrophysics

Astrophysics

5 pages, Latex, 1 Special Macro, 3 .ps figures

Scientific paper

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.

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