title: Landau excitation of spiral density waves in an inhomogeneous disk of stars
abstract: Drift-resonant Landau excitation of spiral density waves in a stellar disk of flat galaxies is proposed. This excitation of waves is suggested as a mechanism for the formation of structural features such as spiral arms and the slow dynamical relaxation of galaxies in a regime of hydrodynamical Jeans-type stability.
authors.affiliation: Department of Physics, Ben-Gurion University of the Negev, P.O. Box 653, Beer-Sheva 84105, Israel.
authors.initials: E
authors.lastname: Griv
authors.initials: M
authors.lastname: Gedalin
authors.initials: D
authors.lastname: Eichler
authors.initials: C
authors.lastname: Yuan