Hall diffusion and the magnetorotational instability in protoplanetary discs

• Published in: Monthly notices of the Royal Astronomical Society Vol. 422; no. 4; pp. 2737 - 2755
• Main Authors: Wardle, Mark, Salmeron, Raquel
• Format: Journal Article
• Language: English
• Published: Oxford, UK Blackwell Publishing Ltd 01.06.2012; Oxford University Press
• Subjects: accretion, accretion discs; Astrophysics; Diffusion; instabilities; Magnetic fields; MHD; Numerical analysis; protoplanetary discs; Protoplanetary disks; stars: formation; MHD; stars: formation; protoplanetary discs; accretion, accretion discs; instabilities
• ISSN: 0035-8711; 1365-2966
• DOI: 10.1111/j.1365-2966.2011.20022.x

The destabilizing effect of Hall diffusion in a weakly ionized Keplerian disc allows the magnetorotational instability (MRI) to occur for much lower ionization levels than would otherwise be possible. However, simulations incorporating Hall and Ohm diffusion give the impression that the consequences...