A study of the core of the Shapley Concentration - I. The sample | Zendy

S. Bardelli | Zendy; E. Zucca | Zendy; G. Vettolani | Zendy; G. Zamorani | Zendy; R. Scaramella | Zendy; C. A. Collins | Zendy; H. T. MacGillivray | Zendy

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A study of the core of the Shapley Concentration - I. The sample

Author(s) -

S. Bardelli,

E. Zucca,

G. Vettolani,

G. Zamorani,

R. Scaramella,

C. A. Collins,

H. T. MacGillivray

Publication year - 1994

Publication title -

monthly notices of the royal astronomical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.058

H-Index - 383

eISSN - 1365-8711

pISSN - 0035-8711

DOI - 10.1093/mnras/267.3.665

Subject(s) - supercluster (genetic) , physics , astrophysics , galaxy cluster , redshift , galaxy , cluster (spacecraft) , brightest cluster galaxy , galaxy group , core (optical fiber) , sample (material) , abell 2744 , astronomy , biochemistry , chemistry , phylogenetics , thermodynamics , computer science , optics , gene , programming language

We report the first results of a spectroscopic survey of galaxies in the coreof the Shapley Concentration, the richest nearby supercluster of clusters ofgalaxies. We have measured 311 new galaxy redshifts in an area of $\sim 4.5$square degrees centered around the Abell cluster A3558. Considering also thedata already available in the literature, the total number of galaxy redshiftsin this area amounts to more than 500. On the basis of these data we estimatethe mean velocities and the velocity dispersions of the Abell clusters A3556,A3558 and the poor cluster SC 1329 -314. Finally, from an analysis of theprojected and three--dimensional distributions of galaxies in this region, weestimate the galaxy overdensity and find that the core of the ShapleyConcentration has an interesting, very complex dynamical state: the mainclusters appear to be interacting with each other, forming a single elongatedstructure containing many subcondensations.Comment: plain Tex, tables and figures upon request (contact BARDELLI@ALMA02.CINECA.IT) BAP 10-1993-030-DD

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