1365-2966/asset/olbannerleft.gif?v=1&s=87f89c955da459679648fd327771ae82f16e5b8e)
1365-2966/asset/olbannerright.gif?v=1&s=08ebd3f71adfe4db0c1f9f65790c139e62520103)
Wave angular momentum and the evolution of planetary rings
Article first published online: 3 MAR 2010
DOI: 10.1111/j.1365-2966.2010.16301.x
© 2010 The Authors. Journal compilation © 2010 RAS
Additional Information
How to Cite
Dranikov, I. L. and Fridman, A. M. (2010), Wave angular momentum and the evolution of planetary rings. Monthly Notices of the Royal Astronomical Society, 404: 415–432. doi: 10.1111/j.1365-2966.2010.16301.x
Publication History
- Issue published online: 21 APR 2010
- Article first published online: 3 MAR 2010
- Accepted 2010 January 5. Received 2010 January 5; in original form 2008 November 12
- Abstract
- Article
- References
- Cited By
Keywords:
- convection;
- hydrodynamics;
- line: formation;
- waves;
- planets and satellites: rings;
- planet–disc interactions
ABSTRACT
A theory is proposed that provides angular momentum conservation through the acoustic drift mechanism for gap and ringlet formation in planetary rings. In this context, a new variant of drift mechanism is found, which is dominant if the collision frequency is of the order of the orbital frequency or less. An angular pseudo-momentum equation is derived for gravitational acoustic waves with dissipation. An explicit expression for angular pseudo-momentum, taking into account vertical wave structure, is obtained. The relation between Eulerian- and Lagrangian-averaged mass fluxes is also derived, and the advantages of the Lagrangian one are emphasized.