Disclike magnetogravitational equilibria
Abstract
Models are constructed of cool, disclike clouds in magnetogravitational equilibrium, immersed in a warm, lowdensity intercloud medium, and with the magnetic field a locally distorted part of the local galactic field. In each case, an area density distribution is adopted, and the detailed fluxtomass distribution constructed from the electromagnetic and dynamical equations. As expected from simple virial theorem arguments, for each density distribution the nondimensional total flux/mass parameter f cannot be less than a critical value f(c) if mechanical equilibrium is to be maintained. Each such limiting model, with f = f(c), has a magnetic neutral point at the edge. It is found that in the various limiting models the fluxtomass distribution has a nearly constant form with f(c) correspondingly nearly constant, in spite of the very different spatial distributions of both massdensity and fluxdensity. The consequences of plasmaplusfield diffusion are briefly discussed.
 Publication:

Monthly Notices of the Royal Astronomical Society
 Pub Date:
 January 1985
 DOI:
 10.1093/mnras/212.2.275
 Bibcode:
 1985MNRAS.212..275M
 Keywords:

 Density Distribution;
 Gravitational Fields;
 Interstellar Magnetic Fields;
 Interstellar Matter;
 Molecular Clouds;
 Astronomical Models;
 Mass Distribution;
 Plasma Diffusion;
 Virial Theorem;
 Astrophysics