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Observational Properties of Triple Galaxies

Published online by Cambridge University Press:  12 April 2016

I. D. Karachentsev
I. D. Karachentsev*
Affiliation:
Special Astrophysical Observatory, Russia

Abstract

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This report presents basic observational parameters for galaxy triplets selected by criterion of their isolation on the sky (=Catalog of Triple Galaxies, Karachentseva et al, 1979). The CTG sample is compared with a sample of wide triple systems from Nearby Galaxies Catalog (Tully, 1988) as well from a new whole-sky catalog of small galaxy groups in the Local Supercluster (Makarov & Karachentsev, 2000). For all the samples their medians of the virial mass-to-luminosity ratio lie in a narrow range, 31 < Mvir/L < 36 (M⊙/L⊙), while the medians of the crossing time occupy a wider range, 0.07 < Tcross < 0.37 (in 1/H units).

Type
Part 1. New Surveys
Information
International Astronomical Union Colloquium , Volume 174: Small Galaxy Groups , 2000 , pp. 1 - 10
Copyright
Copyright © Astronomical Society of the Pacific 2000

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