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A&A Supplement Series, Vol. 125, October II 1997, 247-253

Received October 15; accepted December 19, 1996

Redshift of clusters and galaxies towards the Shapley Concentration gif

H. Quintanatex2html_wrap1033, gif - J. Melnicktex2html_wrap1035 - D. Prousttex2html_wrap1037 - L. Infantetex2html_wrap1033

Send offprint request: H. Quintana
 Departamento de Astronomía y Astrofísica, Pontificia Universidad Católica de Chile, Casilla 104, Santiago 22, Chile
tex2html_wrap1041  European Southern Observatory, Casilla 19001, Santiago 19, Chile
tex2html_wrap1043  Observatoire de Paris, Section de Meudon, DAEC, F-92195 Meudon Cedex, France


We report velocity measurements of galaxies in this, the densest mass concentration within z=0.1, obtained with the multifiber spectrograph MEFOS at ESO, La Silla. We derive redshifts of a number of Abell clusters and draw implications for the supercluster structure. The clusters A3554, A3566, A3577 and AS718 are confirmed as members, while the clusters A3524, A3531, A3542, A3545 and A3549 are shown to be background systems and A3581 a foreground one.

keywords: galaxies: clusters; distances and redshifts -- large-scale structure of the universe

Copyright by the European Southern Observatory (ESO)