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Objectively selected samples of galaxy multiplets: an analysis of observed properties

Published online by Cambridge University Press:  12 April 2016

B. Kelm ,
P. Focardi  and
G. G. C. Palumbo
B. Kelm
Affiliation:
Dipartimento di Astronomia, Univ. di Bologna, Via Ranzani 1, Bologna, Italy
P. Focardi
Affiliation:
Dipartimento di Astronomia, Univ. di Bologna, Via Ranzani 1, Bologna, Italy
G. G. C. Palumbo
Affiliation:
Dipartimento di Astronomia, Univ. di Bologna, Via Ranzani 1, Bologna, Italy

Abstract

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A method of searching for multiplets in a large catalogue of galaxies with measured redshifts is described. Compact Groups samples having different local and global characteristics are generated when the algorithm is applied to ZCAT catalogue. Both local and environmental galaxy density have been computed thus allowing to define truly isolated compact groups as well as compact groups in dense and medium dense environments. We find 40% of our compact groups to be isolated while as much as 20% are identified in high density structures.

Type
Part 2. Properties of Small Groups
Information
International Astronomical Union Colloquium , Volume 174: Small Galaxy Groups , 2000 , pp. 90 - 99
Copyright
Copyright © Astronomical Society of the Pacific 2000

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