The weakly nonlinear theory of density waves in a stellar disk

Details The weakly nonlinear theory of density waves in a stellar disk The weakly nonlinear theory of density waves in a stellar disk

Apr 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994phya..205..299g&link_type=abstract

Physica A, Volume 205, Issue 1-3, p. 299-306.

Physics

17

Scientific paper

Quasilinear theory is applied to the adiabatic wave-star interaction of a differentially-rotating stellar disk of a galaxy. Under the influence of growing spiral waves the velocity dispersion of stars increases and the surface mass density becomes more peaked. The resulting distortion in phase space leads to a decrease in the growth rate of the waves, and as the result the Jeans instability should end after a few rotations of the system. The theory is confirmed by N-body computer simulations.

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