PSCz-1.2 Jy Comparison: A Spherical Harmonics Approach
Abstract
We perform a detailed comparison of the IRAS PSCz and 1.2-Jy spherical harmonic coefficients of the density and velocity fields in redshift space. The monopole terms predicted from the two surveys show some differences. The mismatch between the velocity monopoles arises from faint sources and disappears when extracting a PSCz subsample of galaxies with fluxes larger than 1.2 Jy. The analysis of PSCz dipole moments confirms the same inconsistencies found by Davis, Nusser and Willick (1996) between the IRAS 1.2-Jy gravity field and MARK III peculiar velocities. We conclude that shot-noise, which is greatly reduced in our PSCz gravity field, cannot be responsible for the observed mismatch.
Cite
@article{arxiv.astro-ph/9908358,
title = {PSCz-1.2 Jy Comparison: A Spherical Harmonics Approach},
author = {Luis Teodoro and Enzo Branchini and Carlos Frenk and Will Saunders and Seb Oliver and Oliver Keeble and Michael Rowan-Robinson and Steve Maddox and George Efstathiou and Will Sutherland and Simon White},
journal= {arXiv preprint arXiv:astro-ph/9908358},
year = {2007}
}
Comments
4 pages Latex, 2 figures. Cosmic Flows Workshop, Victoria, Canada, July 1999, ed. S. Courteau, M. Strauss & J. Willick, ASP series