A&A 393, 57-68 (2002)
Local velocity field from sosie galaxies
I. The Peebles' modelJ. N. Terry, G. Paturel and T. Ekholm
CRAL-Observatoire de Lyon, UMR 5574, 69230 Saint-Genis Laval, France
(Received 24 May 2000 / Accepted 20 June 2002 )
Pratton et al. (1997) showed that the velocity field around clusters could generate an apparent distortion that appears as tangential structures or radial filaments. In the present paper we determine the parameters of the Peebles' model (1976) describing infall of galaxies onto clusters with the aim of testing quantitatively the amplitude of this distortion.
The front side and backside infalls can be seen around Virgo and Fornax. In the direction of Virgo the comparison is made with the Peebles' model. We obtain:
with for Virgo and for Fornax, with the adopted units (km s -1 and Mpc).We obtain the following mean distance moduli:
All these quantities form an accurate and coherent system.
Key words: galaxies: general -- galaxies: distances and redshifts -- cosmology: distance scale -- methods: statistical
Offprint request: G. Paturel, firstname.lastname@example.org
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