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Dynamical Friction in Disk Galaxies: The Radial Dependence

Published online by Cambridge University Press:  12 April 2016

Mattias Wahde  and
Karl Johan Donner
Mattias Wahde
Affiliation:
Division of Mechanics, Chalmers University of Technology, 412 96 Göteborg, Sweden
Karl Johan Donner
Affiliation:
Observatory, University of Helsinki, Finland

Abstract

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A simple formula is derived for the force of dynamical friction acting on a satellite galaxy which is moving on a nearly circular orbit around its parent galaxy. Using this formula, estimates of the decay time are computed. The results are then compared with the corresponding results from numerical simulations, and are found to be in good agreement.

Type
Posters of Part V and Part VI
Information
International Astronomical Union Colloquium , Volume 157: Barred Galaxies , 1996 , pp. 372 - 374
Copyright
Copyright © Astronomical Society of the Pacific 1996

References

Donner, K.J. & Sundelius, B. 1993, MNRAS, 265, 88 Google Scholar
Lynden-Bell, D. & Kalnajs, A.J. 1972, MNRAS, 157, 1 Google Scholar
Wahde, M., Donner, K.J., & Simdelius, B. 1995, MNRAS, submittedGoogle Scholar