Spiral instabilities in N-body simulations

Details Spiral instabilities in N-body simulations Spiral instabilities in N-body simulations

2010-11-18

arxiv.org/abs/1011.4226v1

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

Conference article from 1989 posted so as to allow access to the full text through ADS

Scientific paper

N-body simulations of disc galaxies that display recurrent transient spiral patterns are comparatively easy to construct, but are harder to understand. In this paper, I summarise the evidence from such experiments that the spiral patterns result from a recurrent spiral instability cycle. Each wave starts as rapidly growing, small-amplitude instability caused by a deficiency of particles at a particular angular momentum. The resulting large-amplitude wave creates, through resonant scattering, the conditions needed to precipitate a new instability.

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