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A Galaxy Model with Long-lived Two-armed Spiral Structure

Published online by Cambridge University Press:  03 August 2017

Magnus Thomasson ,
Bruce G. Elmegreen ,
Karl Johan Donner  and
Björn Sundelius
Magnus Thomasson
Affiliation:
Onsala Space Observatory S-439 00 Onsala Sweden
Bruce G. Elmegreen
Affiliation:
IBM Research Division T.J. Watson Research Center Yorktown Heights, N.Y. 10598 U.S.A
Karl Johan Donner
Affiliation:
Department of Astronomy/Astrophysics Chalmers University of Technology S-412 96 Göteborg Sweden
Björn Sundelius
Affiliation:
Department of Astronomy/Astrophysics Chalmers University of Technology S-412 96 Göteborg Sweden

Extract

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We present an N-body simulation of a galaxy with a long-lived two-armed spiral pattern. The model consists of a static bulge and halo and an active disk of 60,000 particles. The disk contains 41 % of the total mass of the system. The resulting rotation curve has a steeply rising central part and is falling at larger radii. Half of the disk particles represents an old stellar population, half of them gas clouds that can collide inelastically with each other.

Type
IV- Models of Spiral Structure
Information
Symposium - International Astronomical Union , Volume 146: Dynamics of Galaxies and their Molecular Cloud Distributions , 1991 , pp. 132
Copyright
Copyright © Kluwer 1991