The Equilibrium and Stability of Uniformly Rotating Gaseous Systems in Hydromagnetics, I. Mathematical Technique

Details The Equilibrium and Stability of Uniformly Rotating Gaseous Systems in Hydromagnetics, I. Mathematical Technique The Equilibrium and Stability of Uniformly Rotating Gaseous Systems in Hydromagnetics, I. Mathematical Technique

Mar 1972

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1972ap%26ss..15..415a&link_type=abstract

Astrophysics and Space Science, Volume 15, Issue 3, pp.415-425

Astronomy and Astrophysics

Astrophysics

3

Scientific paper

The theory for investigating the equilibrium and stability of a uniformly rotating gaseous system with a prevalent magnetic field is developed by using the virial tensor approach. Most of the discussion in this paper depends on the assumption that on the surface of the system, the magnetic field is zero. In Appendix A, however, we have considered the case in which the surface magnetic field is non-zero. We have obtained the nine modes of oscillations, grouped into the transverse shear, toroidal and pulsation modes. From this analysis have also found the conditions under which the sequence of a uniformly rotating axially symmetric configuration in the presence of a magnetic field should have a point of bifurcation, that is, a point where objects with genuine triplanar symmetry branch off. This condition is also generalized in the Appendix to include the effects of differential rotation and non-zero surface magnetic field. Applications to the cosmogonic fission problem, the study of the pulsation of rotating magnetic stars and some radio astrophysical problems are briefly discussed.

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