Open AccessThe stability of turbulent accretion discs with magnetically influenced winds
Author(s) -
Campbell C. G.
Publication year - 2001
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1046/j.1365-8711.2001.04169.x
Subject(s) - physics , dynamo , turbulence , angular momentum , accretion (finance) , magnetic field , mechanics , inflow , astrophysics , magnetohydrodynamics , magnetorotational instability , classical mechanics , quantum mechanics
The stability of turbulent accretion discs is considered, in which a magnetically influenced wind plays a major role in driving the inflow. The magnetic field is generated by a dynamo operating in the disc, involving radial shear and turbulence. The steady angular momentum balance is found to be linearly stable for a range of radial boundary conditions, and an expression is derived for the adjustment time‐scale as a function of the equilibrium ratio of the magnetic and viscous disc torques.