http://arxiv.org/abs/1406.2467
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 $V_{LG} < 2000$ km/s inside the sky area of RA = [13.0 … 18.0]$^h$ and Dec. = [$-$5 … $+$10]$^\circ$. At present, 161 of them have individual distance estimates. The galaxy distribution on peculiar velocities along the strip exhibits the known Virgo-centric infall at RA < 14$^h$ and some signs of outflow from the Local Void at RA > 17$^h$. 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 [17$-$27]Mpc, being all farther from us than the Virgo cluster. The Bootes filament contains the total stellar mass of $2.7\times10^{12} M_\odot$ and the total virial mass of $9.07\times10^{13} M_\odot$, having the average density of dark matter to be \Omega_m = 0.09, i.e. a factor three lower than the global cosmic average.
I. Karachentsev, V. Karachentseva and O. Nasonova
Wed, 11 Jun 14
37/68
Comments: 19 pages, 7 figures, 3 tables. Accepted by Astrofizika
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