# Landau Modes are Eigenmodes of Stellar Systems in the Limit of Zero Collisions

@inproceedings{Ng2021LandauMA, title={Landau Modes are Eigenmodes of Stellar Systems in the Limit of Zero Collisions}, author={C. S. Ng and Ashis Bhattacharjee}, year={2021} }

We consider the spectrum of eigenmodes in a stellar system dominated by gravitational forces in the limit of zero collisions. We show analytically and numerically using the LenardBernstein collision operator that the Landau modes, which are not true eigenmodes in a strictly collisionless system (except for the Jeans unstable mode), become part of the true eigenmode spectrum in the limit of zero collisions. Under these conditions, the continuous spectrum of true eigenmodes in the collisionless… Expand

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