Galaxy motions in the Bootes strip
Abstract
We explore the structure and kinematics of a dispersed filament of galaxies residing between the Local Void and the Virgo cluster. For such purpose, we consider a sample of 361 galaxies with radial velocities km/s inside the sky area of RA = [13.0 ... 18.0] and Dec. = [5 ... 10]. At present, 161 of them have individual distance estimates. The galaxy distribution on peculiar velocities along the strip exhibits the known Virgo-centric infall at RA < 14 and some signs of outflow from the Local Void at RA > 17. Majority of the Bootes strip galaxies (56%) belong to 13 groups and 11 pairs, with the most prominent group around NGC5846. The Bootes strip groups reside within [1727]Mpc, being all farther from us than the Virgo cluster. The Bootes filament contains the total stellar mass of and the total virial mass of , having the average density of dark matter to be , i.e. a factor three lower than the global cosmic average.
Keywords
Cite
@article{arxiv.1406.2467,
title = {Galaxy motions in the Bootes strip},
author = {Igor D. Karachentsev and Valentina E. Karachentseva and Olga G. Nasonova},
journal= {arXiv preprint arXiv:1406.2467},
year = {2015}
}
Comments
19 pages, 7 figures, 3 tables. Accepted by Astrofizika