
TY  - JOUR
A1  - Drinkwater, Michael J. 
A1  - Parker, Quentin A. 
A1  - Proust, Dominique 
A1  - Slezak, Eric 
A1  - Quintana, Hernán 
T1  - The Large Scale Distribution of Galaxies in the Shapley Supercluster
JF  - Publications of the Astronomical Society of Australia
JO  - Publ. Astron. Soc.  Aust.
Y1  - 2004
VL  - 21
IS  - 1
SP  - 89
EP  - 96
KW  - Redshifts of galaxies &#8212; clusters of galaxies &#8212; subclustering
UR  - https://doi.org/10.1071/AS03057 
N2  - We present new results of our wide-field redshift survey of galaxies in a 182 square degree region of the Shapley Supercluster (SSC) based on observations with the FLAIR-II spectrograph on the UK Schmidt Telescope (UKST). In this paper we present new measurements to give a total sample of redshifts for 710 bright (R &#8804; 16.6) galaxies, of which 464 are members of the SSC (8000 &#60; v &#60; 18 000 km s&#8211;1). Our data reveal that the main plane of the SSC (v &#8776; 14 500 km s&#8211;1) extends further than previously realised, filling the whole extent of our survey region of 10 degrees by 20 degrees on the sky (35 Mpc by 70 Mpc, for H0 &equals; 75 km s&#8211;1 Mpc&#8211;1). There is also a significant structure associated with the slightly nearer Abell 3571 cluster complex (v &#8776; 12 000 km s&#8211;1) with a caustic structure evident out to a radius of 6 Mpc. These galaxies seem to link two previously identified sheets of galaxies and establish a connection with a third one at V (vBar) = 15 000 km s&#8211;1 near RA = 13h. They also tend to fill the gap of galaxies between the foreground Hydra-Centaurus region and the more distant SSC. We calculate galaxy overdensities of 5.0 &#177; 0.1 over the 182 square degree region surveyed and 3.3 &#177; 0.1 in a 159 square degree region excluding rich clusters. Over the large region of our survey the inter-cluster galaxies make up 46 per cent of all galaxies in the SSC region and may contribute a similar amount of mass to the cluster galaxies. 
ER  -

