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Dynamical Friction in Pairs of Elliptical Galaxies

Published online by Cambridge University Press:  12 April 2016

Philippe Prugniel  and
Françoise Combes
Philippe Prugniel
Affiliation:
European Southern Observatory, Karl-Schwarzschild-Str. 2, D-8046 Garching, F.R.G.
Françoise Combes
Affiliation:
Observatoire de Paris, DEMIRM, 2, PL J. Janssen F-92195 Meudon, France

Abstract

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We present numerical experiments on dynamical friction in pairs of elliptical galaxies of unequal mass. We confirm that the self-gravity of the response is not important and show the drastic effect of the deformability of the companion which reduces the decay time by more than a factor 2. Almost the same amount of orbital energy is dissipated within the satellite than within the large galaxy. Finally, we discuss the importance of distant encounters for the dynamical evolution of systems of galaxies.

Type
VII. Classical Theory of Pairs
Information
International Astronomical Union Colloquium , Volume 124: Paired and Interacting Galaxies , 1990 , pp. 543 - 548
Copyright
Copyright © NASA 1990

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