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Energy and Angular Momentum Transfer in Binary Galaxies

Published online by Cambridge University Press:  12 April 2016

P.M.S. Namboodiri  and
R.K. Kochhar
P.M.S. Namboodiri
Affiliation:
Indian Institute of Astrophysics, Koramangala Bangalore 560034 India
R.K. Kochhar
Affiliation:
Indian Institute of Astrophysics, Koramangala Bangalore 560034 India

Abstract

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We have numerically studied tidal effects of a massive perturber on a satellite galaxy. The model consists of a spherical satellite galaxy and a point mass perturber and the encounter is non-penetrating. A wide range of density ratios and eccentricities of the relative orbits have been considered. The disruption of the satellite galaxy has been observed when the numerical value of the fractional change in the energy is greater than two. The changes in the energy and angular momentum show smooth variation in the case of unbound orbits and irregular variation in the bound orbit cases. It is shown that for a constant pericentric distance, increasing the density ratio decreases the tidal effects; and for a given density ratio an increase in the eccentricity decreases the tidal effects.

Type
VII. Classical Theory of Pairs
Information
International Astronomical Union Colloquium , Volume 124: Paired and Interacting Galaxies , 1990 , pp. 589 - 593
Copyright
Copyright © NASA 1990

References

Alladin, S.M. & Narasimhan, K.S.V.S. 1982. Phys. Rep. 92 339.Google Scholar
Miller, R.H. 1986. Astr. Ap. 167 41.Google Scholar
Namboodiri, P.M.S. & Kochhar, R.K. 1990. M.N.R.A.S. (in press).Google Scholar