Structure and dynamics of the Shapley Supercluster - Velocity catalogue, general morphology and mass

Proust, D., Quintana, H., Carrasco, E. R., Reisenegger, A., Slezak, E., Muriel, H., Dunner, R., Sodre, L., Drinkwater, M. J., Parker, Q. A. and Ragone, C. J. (2006) Structure and dynamics of the Shapley Supercluster - Velocity catalogue, general morphology and mass. Astronomy & Astrophysics, 447 1: 133-144. doi:10.1051/0004-6361:20052838

Author Proust, D.
Quintana, H.
Carrasco, E. R.
Reisenegger, A.
Slezak, E.
Muriel, H.
Dunner, R.
Sodre, L.
Drinkwater, M. J.
Parker, Q. A.
Ragone, C. J.
Title Structure and dynamics of the Shapley Supercluster - Velocity catalogue, general morphology and mass
Journal name Astronomy & Astrophysics   Check publisher's open access policy
ISSN 0004-6361;1423-0746
Publication date 2006
Sub-type Article (original research)
DOI 10.1051/0004-6361:20052838
Volume 447
Issue 1
Start page 133
End page 144
Total pages 12
Place of publication France
Publisher Edp Sciences S A
Collection year 2006
Language eng
Subject C1
240100 Astronomical Sciences
780102 Physical sciences
Abstract We present results of our wide-field redshift survey of galaxies in a 285 square degree region of the Shapley Supercluster (SSC), based on a set of 10 529 velocity measurements (including 1201 new ones) on 8632 galaxies obtained from various telescopes and from the literature. Our data reveal that the main plane of the SSC (v approximate to 14 500 km s(-1)) extends further than previous estimates, filling the whole extent of our survey region of 12 degrees by 30 degrees on the sky (30 x 75 h(-1) Mpc). There is also a connecting structure associated with the slightly nearer Abell 3571 cluster complex (v approximate to 12 000 km s(-1)). These galaxies seem to link two previously identified sheets of galaxies and establish a connection with a third one at v = 15 000 km s(-1) near RA = 13(h). They also tend to fill the gap of galaxies between the foreground Hydra-Centaurus region and the more distant SSC. In the velocity range of the Shapley Supercluster (9000 km s(-1) < cz < 18 000 km s(-1)), we found redshift-space overdensities with b(j) < 17.5 of similar or equal to 5.4 over the 225 square degree central region and similar or equal to 3.8 in a 192 square degree region excluding rich clusters. Over the large region of our survey, we find that the intercluster galaxies make up 48 per cent of the observed galaxies in the SSC region and, accounting for the different completeness, may contribute nearly twice as much mass as the cluster galaxies. In this paper, we discuss the completeness of the velocity catalogue, the morphology of the supercluster, the global overdensity, and some properties of the individual galaxy clusters in the Supercluster.
Keyword Galaxies : Clusters : Individual : Shapley Supercluster
Galaxies : Clusters : Individual : A 3558
Galaxies : Distances And Redshifts
Cosmology : Observations
Cosmology : Large-scale Structure Of Universe
Galaxies : Clusters : General
Astronomy & Astrophysics
Supercosmos Sky Survey
Galaxy Redshift Survey
Spectroscopic Observations
Q-Index Code C1

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Created: Wed, 15 Aug 2007, 09:16:27 EST