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Accretion Discs with Strong Toroidal Magnetic Fields
M. C. Begelman, J. E. Pringle
Simulations and analytic arguments suggest that the turbulence driven by magnetorotational instability (MRI) in accretion discs can amplify the toroidal (azimuthal) component of th…
The Nature of SS433 and the Ultraluminous X-ray Sources
M. C. Begelman, A. R. King, J. E. Pringle
The periodic precession (162--day) and nodding (6.3--day) motions of the jets in SS433 are driven in the outer regions of the disc, whereas the jets themselves, being relativistic,…
Photoevaporation of protoplanetary discs II: evolutionary models and observable properties
R. D. Alexander, C. J. Clarke, J. E. Pringle
We present a new model for protoplanetary disc evolution. This model combines viscous evolution with photoevaporation of the disc, in a manner similar to Clarke, Gendrin & Sotomayo…
Photoevaporation of protoplanetary discs I: hydrodynamic models
R. D. Alexander, C. J. Clarke, J. E. Pringle
In this paper we consider the effect of the direct ionizing stellar radiation field on the evolution of protoplanetary discs subject to photoevaporative winds. We suggest that mode…