Secular resonant dressed orbital diffusion - I. Method and WKB limit for tepid discs - INSU - Institut national des sciences de l'Univers Access content directly
Journal Articles Monthly Notices of the Royal Astronomical Society Year : 2015

Secular resonant dressed orbital diffusion - I. Method and WKB limit for tepid discs

Abstract

The equation describing the secular diffusion of a self-gravitating collisionless system induced by an exterior perturbation is derived while assuming that the time-scale corresponding to secular evolution is much larger than that corresponding to the natural frequencies of the system. Its two-dimensional formulation for a tepid galactic disc is also derived using the epicyclic approximation. Its Wentzel-Kramers-Brillouin (WKB) limit is found while assuming that only tightly wound transient spirals are sustained by the disc. It yields a simple quadrature for the diffusion coefficients which provides a straightforward understanding of the loci of maximal diffusion within the disc.
Fichier principal
Vignette du fichier
stv359.pdf (424.07 Ko) Télécharger le fichier
Origin : Publisher files allowed on an open archive

Dates and versions

insu-03644951 , version 1 (26-04-2022)

Identifiers

Cite

Jean-Baptiste Fouvry, Christophe Pichon, Simon Prunet. Secular resonant dressed orbital diffusion - I. Method and WKB limit for tepid discs. Monthly Notices of the Royal Astronomical Society, 2015, 449, pp.1967-1981. ⟨10.1093/mnras/stv359⟩. ⟨insu-03644951⟩
16 View
8 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More