The Magnetorotational Instability

Details The Magnetorotational Instability The Magnetorotational Instability

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005oicc.conf...67h&link_type=abstract

OPEN ISSUES IN CORE COLLAPSE SUPERNOVA THEORY . Held 22-24 June 2004 in National Institute for Nuclear Theory, University of Was

Physics

Nuclear Physics

Nuclear Theory

2

Scientific paper

The magnetorotational instability (MRI) has proven to be of fundamental importance to accretion disk systems. If core collapse supernovae contain weak magnetic fields and differential rotation then this instability should again be present. This paper reviews the basic properties of the MRI and what has been learned in disk studies. While attention is often focused on the exponential growth of the magnetic field from the MRI, the more general point is that a magnetic field fundamentally alters the basic stability criteria in a rotating plasma, regardless of the field's strength. Thus, magnetic fields are likely to be important in a core collapse supernova regardless of whether or not they are amplified to equipartition with the thermal, rotational, or gravitational energy densities.

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