The Dipole Anisotropy of the 2mass Redshift Survey
Abstract
We estimate the flux weighted acceleration on the Local Group (LG) from the near-infrared Two Micron All Sky Redshift Survey (2MRS). The near-infrared flux weighted dipoles are very robust because they closely approximate a mass weighted dipole, bypassing the effects of redshift distortions and require no preferred reference frame. We use this method with the redshift information to determine the change in dipole with distance. The LG dipole seemingly converges by 60 Mpc/h. Assuming convergence, the comparison of the 2MRS flux dipole and the CMB dipole provides a value for the combination of the mass density and luminosity bias parameters Omega_m^0.6/b_L= 0.40+/-0.09.
Cite
@article{arxiv.astro-ph/0605343,
title = {The Dipole Anisotropy of the 2mass Redshift Survey},
author = {P. Erdogdu and J. P. Huchra and O. Lahav and M. Colless and R. M. Cutri and E. Falco and T. George and T. Jarrett and D. H. Jones and C. S. Kochanek and L. Macri and J. Mader and N. Martimbeau and M. Pahre and Q. Parker and A. Rassat and W. Saunders},
journal= {arXiv preprint arXiv:astro-ph/0605343},
year = {2007}
}
Comments
4 pages, 2 figures, Contribution to Rencontres de Moriond: Contents and Structures of the Universe, March 18-25, 2006, La Thuile