Astrophysics and Space Science

, Volume 216, Issue 1–2, pp 353–357 | Cite as

How faithful areN-body simulations of disc galaxies?-artificial suppression of gaseous dynamical instabilities

  • Alessandro B. Romeo


High-softening two-dimensional models, frequently employed inN-body experiments, do not provide faithful simulations of real galactic discs. A prescription (♠) is given for choosing meaningful values of the softening length. In addition, a local stability criterion (♣) is given for choosing meaningful input values of the Toomre parameter for a given softening length. Such a criterion should also provide a key to a correct interpretation of computational results in terms of real phenomena.


Computational Result Stability Criterion Local Stability Correct Interpretation Dynamical Instability 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Kluwer Academic Publishers 1994

Authors and Affiliations

  • Alessandro B. Romeo
    • 1
  1. 1.Onsala Space ObservatoryChalmers University of TechnologyOnsalaSweden

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