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How faithful are N-body simulations of disc galaxies?

Alessandro Romeo (Onsala Rymdobservatorium)
Astronomy and Astrophysics (0004-6361). Vol. 286 (1994), p. 799-806.
[Artikel, refereegranskad vetenskaplig]

High-softening two-dimensional models, frequently employed in N-body experiments, do not provide faithful simulations of real galactic discs. A prescription [Eqs. (17) and (18)] is given for choosing meaningful values of the softening length in standard regimes of astrophysical interest, when both the stellar and gaseous components are present. In addition, a stability criterion [Eq. (10); see also Eq. (11)] 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 the correct interpretation of computational results in terms of real phenomena.

Denna post skapades 2015-04-09. Senast ändrad 2015-04-09.
CPL Pubid: 214996


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