Resonant thickening of self-gravitating discs: imposed or self-induced orbital diffusion in the tightly wound limit

Jean-Baptiste Fouvry, Christophe Pichon, Pierre-Henri Chavanis +1

The secular thickening of a self-gravitating stellar galactic disc is investigated using the dressed collisionless Fokker-Planck equation and the inhomogeneous multicomponent Bales…