NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-20 T12:14:05 PDT
Help | Comment | NED Home

For refcode 1998AJ....116.2632G:
Retrieve 24 NED objects in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by American Astronomical Society. Reproduced by permission
1998AJ....116.2632G THE MOTIONS OF CLUSTERS OF GALAXIES AND THE DIPOLES OF THE PECULIAR VELOCITY FIELD RICCARDO GIOVANELLI AND MARTHA P. HAYNES Center for Radiophysics and Space Research and National Astronomy and Ionosphere Center,1 Cornell University, Ithaca, NY 14853 JOHN J. SALZER Department of Astronomy, Wesleyan University, Middletown, CT 06459 GARY WEGNER Department of Physics and Astronomy, Dartmouth College, Hanover, NH 03755 LUIZ N. DA COSTA European Southern Observatory, Karl-Schwarzschild-Strasse 2, D-85748 Garching bei Munchen, Germany; and Observatorio Nacional, Rio de Janeiro, Brazil AND WOLFRAM FREUDLING Space Telescope European Coordinating Facility and European Southern Observatory, Karl-Schwarzschild-Strasse 2, D-85748 Garching bei Munchen, Germany Received 1998 July 17; revised 1998 August 17 ABSTRACT In preceding papers of this series, TF relations for galaxies in 24 clusters with radial velocities between 1000 and 9200 km s^-1^ (SCI sample) were obtained, a Tully-Fisher (TF) template relation was constructed, and mean offsets of each cluster with respect to the template were obtained. Here, an estimate of the line-of-sight peculiar velocities of the clusters and their associated errors are given. It is found that cluster peculiar velocities in the cosmic microwave background reference frame do not exceed 600 km s^-1^ and that their distribution has a line-of-sight dispersion of 300 km s^-1^, suggesting a more quiescent cluster peculiar velocity field than previously reported. When measured in a reference frame in which the Local Group is at rest, the set of clusters at cz > 3000 km s^-1^ exhibits a dipole moment in agreement with that of the CMB, both in amplitude and apex direction. It is estimated that the bulk flow of a sphere of 6000 km s^-1^ radius in the CMB reference frame is between 140 and 320 km s^-1^. Key words: cosmic microwave background-cosmology: observations -distance scale-galaxies: distances and redshifts
Retrieve 24 NED objects in this reference.
Please click here for ADS abstract

Back to NED Home