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Large Peculiar Velocities in the Hydra Centaurus Supercluster

Published online by Cambridge University Press:  03 August 2017

M. Aaronson ,
G.D. Bothun ,
K.G. Budge ,
J.A. Dawe ,
R.J. Dickens ,
P.J. Hall ,
J.R. Lucey ,
J.R. Mould ,
J.D. Murray  and
R.A. Schommer
...Show all authors
M. Aaronson
Affiliation:
Steward Observatory, University of Arizona
G.D. Bothun
Affiliation:
University of Michigan
K.G. Budge
Affiliation:
California Institute of Technology
J.A. Dawe
Affiliation:
Australian National University
R.J. Dickens
Affiliation:
Rutherford Appleton Laboratory
P.J. Hall
Affiliation:
Australian National Radio Astronomy Observatory
J.R. Lucey
Affiliation:
Anglo Australian Observatory
J.R. Mould
Affiliation:
California Institute of Technology
J.D. Murray
Affiliation:
Australian National Radio Astronomy Observatory
R.A. Schommer
Affiliation:
Rutgers University
A.E. Wright
Affiliation:
Australian National Radio Astronomy Observatory

Abstract

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Six clusters forming part of the Hydra-Cen Supercluster and its extension on the opposite side of the galactic plane are under study at 21 cm with the Parkes radiotelescope. The infrared Tully-Fisher relation is used to determine the relative distances of the clusters. These clusters exhibit significant and generally positive peculiar velocities ranging from essentially zero for the Hydra cluster to as much as 1000 km/sec for the Pavo and Centaurus clusters. An upper limit of 500 km/sec was previously found in the study of clusters accessible from Arecibo. Data collection is not yet complete, however, and is further subject to unstudied systematic errors due to present reliance on photographic galaxy diameters. Nevertheless, these preliminary results support the notion of a large scale (and presumably gravitationally) disturbed velocity field in the second and third quadrants of the supergalactic plane.

Type
Research Article
Information
Symposium - International Astronomical Union , Volume 130: Large Scale Structures of the Universe , 1988 , pp. 185 - 189
Copyright
Copyright © Reidel 1988 

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