The role of Hall diffusion in the magnetically threaded thin accretion discs

Abstract

We study role of the Hall diffusion in the magnetic star-disc interaction. In a simplified steady state configuration, the total torque is calculated in terms of the fastness parameter and a new term because of the Hall diffusion. We show the total torque reduces as the Hall term becomes more significant. Also, the critical fastness parameter (at which the total torque is zero) reduces because of the Hall diffusion.

Accepted for publication in Astrophysics and Space Science

References in corpus (5)

• Magnetically Torqued Thin Accretion Disks
• Mean-Field Magnetohydrodynamics of Accretion Disks
• The Hall instability of weakly ionized, radially stratified, rotating disks
• Hall equilibrium of thin Keplerian disks embedded in mixed poloidal and toroidal magnetic fields
• Thin accretion disc with a corona in a central magnetic field