M.J.Drinkwater, D.Proust, Q.A.Parker, H.Quintana, E.Slezak, PASA, 16 (2), 113
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Next Section: Introduction
New Structure In The Shapley Supercluster
M.J.Drinkwater1
D.Proust2
Q.A.Parker3
H.Quintana4
E.Slezak5
Accepted for Publications of the Astronomical Society of Australia 1999 Feb 22
1 School of Physics, University of New South Wales, Sydney 2052, Australia, mjd@phys.unsw.edu.au
2 DAEC, Observatoire de Meudon, 92195 Meudon Cedex, France, proust@obspm.fr
3 Anglo-Australian Observatory, Coonabarabran, NSW 2357, Australia, qap@aaocbn.aao.gov.au
4 Departamento de Astronomia y Astrofisica, Pontificia Universidad Católica de Chile
Casilla 104, Santiago 22, Chile, hquintana@astro.puc.cl
5 Observatoire de Nice, 06304 Nice Cedex 4 France, slezak@obs-nice.fr
Abstract:
The galaxies we measured were uniformly distributed over the survey area in contrast to previous samples which were concentrated in several rich Abell clusters. Most of the galaxies (230) were members of the Shapley supercluster: they trace out two previously unknown sheets of galaxies linking the Abell clusters of the supercluster. In a 44 deg2 area of the supercluster excluding the Abell clusters, these sheets alone represent an overdensity of a factor of 
compared to a uniform galaxy distribution.
The supercluster is not flattened in the Declination direction as was suggested in previous papers. Within our survey area the new galaxies contribute an additional 50% to the known contents of the Shapley supercluster with a corresponding increase in its contribution to the motion of the local group.
Keywords: galaxies: clusters; distances and redshifts -- large-scale structure of the universe
© Copyright Astronomical Society of Australia 1997