Spiral instabilities in N-body simulations – II. Emergence from noise
Author
Sellwood, J AAffiliation
Univ Arizona, Steward ObservIssue Date
2020-01-08
Metadata
Show full item recordPublisher
OXFORD UNIV PRESSCitation
J A Sellwood, Spiral instabilities in N-body simulations – II. Emergence from noise, Monthly Notices of the Royal Astronomical Society, Volume 492, Issue 3, March 2020, Pages 3103–3106, https://doi.org/10.1093/mnras/staa034Rights
Copyright © 2020 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical SocietyCollection Information
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.Abstract
An earlier paper presented the potentially significant discovery that disturbances in simplified simulations of a stellar disc model that was predicted to be stable in linear theory grew to large amplitude over a long period of time. The ultimate appearance of true instabilities was attributed to non-linear scattering by a succession of collective waves excited by shot noise from the finite number of particles. The paper concluded that no finite number of particles, however large, could mimic a smooth disc. As this surprising finding has been challenged as an artefact of the numerical scheme employed, we here present a new calculation of the same model using a different grid geometry that confirms the original behaviour.ISSN
0035-8711Version
Final published versionae974a485f413a2113503eed53cd6c53
10.1093/mnras/staa034