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- Title
On the Magnetogravitational Instability of a Ferromagnetic Dust Cloud in the Presence of Nonuniform Rotation.
- Authors
Dhiman, Joginder S.; Dadwal, Rekha
- Abstract
The effect of a nonuniform magnetic field on the gravitational instability of a nonuniformly rotating infinitely extending axisymmetric cylinder in a homogenous ferromagnetic medium has been studied. The propagation of the wave is allowed along radial direction. A general dispersion relation, using the normal mode analysis method on the perturbation equations of the problem, is obtained. It is found that Bel and Schatzman criterion determines the gravitational instability of this general problem. Thus, it appears that the effect of non-uniformmagnetic field on the gravitational instability as discussed by (Dhiman and Dadwal, 2010) is marginalized by the magnetic polarizability of ferrofluid.
- Subjects
GRAVITATIONAL instability; FERROMAGNETISM; COSMIC dust; COSMIC rotation; COSMIC magnetic fields; DISPERSION relations; MAGNETIC fluids
- Publication
ISRN Astronomy & Astrophysics, 2012, p1
- ISSN
2090-4738
- Publication type
Article
- DOI
10.5402/2012/104941