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Astrophysical Bulletin

, Volume 73, Issue 2, pp 124–141 | Cite as

Surveying the Local Supercluster Plane

  • O. G. Kashibadze
  • I. D. KarachentsevEmail author
  • V. E. Karachentseva
Article
  • 24 Downloads

Abstract

We investigate the distribution and velocity field of galaxies situated in a band of 100 by 20 degrees centered on M87 and oriented along the Local supercluster plane. Our sample amounts 2158 galaxies with radial velocities less than 2000 km s−1. Of them, 1119 galaxies (52%) have distance and peculiar velocity estimates. About 3/4 of early-type galaxies are concentrated within the Virgo cluster core, most of the late-type galaxies in the band locate outside the virial radius. Distribution of gas-rich dwarfs with MHI >M* looks to be insensitive to the Virgo cluster presence. Among 50 galaxy groups in the equatorial supercluster band 6 groups have peculiar velocities about 500–1000 km s−1 comparable with virial motions in rich clusters. The most cryptic case is a flock of nearly 30 galaxies around NGC4278 (Coma I cloud), moving to us with the mean peculiar velocity of −840 km s−1. This cloud (or filament?) resides at a distance of 16.1 Mpc from us and approximately 5 Mpc away from the Virgo center. Galaxies around Virgo cluster exhibit Virgocentric infall with an amplitude of about 500 km s−1. Assuming the spherically symmetric radial infall, we estimate the radius of the zero-velocity surface to be R0 = (7.0±0.3) Mpc that yields the total mass of Virgo cluster to be (7.4 ± 0.9)× 1014M in tight agreement with its virial mass estimates. We conclude that the Virgo outskirts does not contain significant amounts of dark mater beyond its virial core.

Key words

galaxies: kinematics and dynamics galaxies: distances and redshifts galaxies: groups 

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Copyright information

© Pleiades Publishing, Ltd. 2018

Authors and Affiliations

  • O. G. Kashibadze
    • 1
  • I. D. Karachentsev
    • 1
    Email author
  • V. E. Karachentseva
    • 2
  1. 1.Special Astrophysical ObservatoryRussian Academy of SciencesNizhnii ArkhyzRussia
  2. 2.Main Astronomical ObservatoryNational Academy of Sciences of UkraineKyivUkraine

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