Hydromagnetic Oscillations of a Self-Gravitating Fluid.
Abstract
Hydromagnetic modes of oscillation of a self-gravitating fluid are investigated by means of the tensor virial theorem. For a spherically symmetric density distribution and an axisymmetric magnetic field, the equations yield the radial homologous pulsation and the Kelvin oscillation, with the periods modified by the magnetic field. The effect on these oscillations of an axisymmetric distortion of the configuration of equilibrium is evaluated In the case of resonance between the two modes, the poles and the equator oscillate independently of each other and with slightly different periods There are also four modes of oscillation which do not preserve axisymmetry.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- March 1962
- DOI:
- 10.1086/147292
- Bibcode:
- 1962ApJ...135..593W