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Nearby galaxies. IV. The global Hubble parameter and the dispersion of the Hubble relation
Author(s) -
Schmidt K.H.,
Karachentsev I. D.
Publication year - 1996
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.2113170307
Subject(s) - virgo cluster , physics , hubble's law , astrophysics , velocity dispersion , galaxy , hubble volume , local group , astronomy , radial velocity , elliptical galaxy , redshift , dwarf galaxy , stars
Using a spherically symmetric model of the Virgo flow the global Hubble parameter has been estimated from the observed radial velocities and the photometrically measured distances of nearby galaxies. Adopting the observed recession velocity of the Virgo Cluster to about 1000 km s −1 and the infall velocity of the Local Group to 350 km s −1 the global Hubble constant results to 73 ± 10 km s −1 Mpc −1 . This value corresponds with the distance of the Virgo Cluster of 18 ± 2 Mpc. The cosmic dispersion of the galaxies around the Hubble relation is of order of 35 km s −1 .