Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...449..789b&link_type=abstract
Astrophysical Journal v.449, p.789
Astronomy and Astrophysics
Astronomy
8
Accretion, Accretion Disks, Hydrodynamics, Magnetohydrodynamics: Mhd
Scientific paper
We examine a rotating thick-disk equilibrium in the presence of external gravity and intrinsic dipolar magnetic field due to a nonrotating central object. The solutions we have found show that the pressure and density equilibrium profiles are strongly modified by a self-consistently generated toroidal magnetic field. By drawing an analogy with the Couette flow, a stability criterion for the derived solutions is obtained. It is found that such an equilibrium cannot support a toroidal magnetic field of arbitrary strength. The magnetic field line topology is such that kinks develop in the field line structure. Such kinks will probably give rise to instabilities for a strong toroidal component of the magnetic field.
Banerjee Dipti
Bhatt Jitesh R.
Das A. C.
Prasanna A. R.
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