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Tidal distortions in pairs of early-type galaxies

Published online by Cambridge University Press:  12 April 2016

Ph. Prugniel  and
E. Davoust
Ph. Prugniel
Affiliation:
European Southern ObservatoryKarl-Schwarzschild Str. 2 D-8046, Garching, Fed. Rep. of Germany
E. Davoust
Affiliation:
Observatoire Midi Pyrénées, 14, Av. E. Belin F-31400, Toulouse, France

Extract

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We are conducting an imaging survey of pairs of elliptical galaxies which has already produced interesting results. Some pairs present a common pattern of distortion interpreted in terms of tidal effects (Davoust and Prugniel, 1988; Prugniel et al., 1989). Other examples drawn from the literature (Borne and Hoessel, 1988; Colina and Pérez-Fournon, 1990) share the same morphology. This Poster presents new cases and lists the characteristics of 24 such systems.

Our pairs are drawn from a sample of binary and multiple galaxies which has in turn been extracted from the CGCG, UGC (Nilson, 1973) and VV (Vorontsov-Velyaminov, 1959) catalogues. This sample includes that of Karachentsev (1972). It contains 1800 pairs, among which 700 are S – S or mixed morphology pairs. We are working on the remainder to produce a sample of close physical pairs of elliptical galaxies (we also include bulge dominated S0’s since the morphological discrimination from ellipticals is often ambiguous, in particular for interacting galaxies).

Type
I. Classical Observations of Pairs
Information
International Astronomical Union Colloquium , Volume 124: Paired and Interacting Galaxies , 1990 , pp. 65 - 68
Copyright
Copyright © NASA 1990

References

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