The Bulk Motion of Flat Edge-On Galaxies Based on 2MASS Photometry
Abstract
We report the results of applying the 2MASS Tully-Fisher (TF) relations to study the galaxy bulk flows. For 1141 all-sky distributed flat RFGC galaxies we construct J, H, K_s TF relations and find that Kron magnitudes show the smallest dispersion on the TF diagram. For the sample of 971 RFGC galaxies with V_{3K} < 18000 km/s we find a dispersion and an amplitude of bulk flow V= 199 +/-61 km/s, directed towards l=301 degr +/-18 degr, b=-2 degr +/-15 degr. Our determination of low-amplitude coherent flow is in good agreement with a set of recent data derived from EFAR, PSCz, SCI/SCII samples. The resultant two- dimensional smoothed peculiar velocity field traces well the large-scale density variations in the galaxy distributions. The regions of large positive peculiar velocities lie in the direction of the Great Attractor and Shapley concentration. A significant negative peculiar velocity is seen in the direction of Bootes and in the direction of the Local void. A small positive peculiar velocity (100 -- 150 km/s) is seen towards the Pisces-Perseus supercluster, as well as the Hercules - Coma - Corona Borealis supercluster regions.
Cite
@article{arxiv.astro-ph/0305483,
title = {The Bulk Motion of Flat Edge-On Galaxies Based on 2MASS Photometry},
author = {Yu. N. Kudrya and V. E. Karachentseva and I. D. Karachentsev and S. N. Mitronova and T. H. Jarrett and W. K. Huchtmeier},
journal= {arXiv preprint arXiv:astro-ph/0305483},
year = {2009}
}
Comments
10 pages, 5 figures. A&A/2003/3582 accepted 15.05.2003