Magnetohydrodynamic Instabilities in a Magnetic Accretion Disk

Details Magnetohydrodynamic Instabilities in a Magnetic Accretion Disk Magnetohydrodynamic Instabilities in a Magnetic Accretion Disk

Jul 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981pthph..66..172h&link_type=abstract

Progress of Theoretical Physics, Vol. 66, No. 1, pp. 172-179

Physics

5

Scientific paper

We investigate two magnetohydrodynamic instabilities, i.e., the Rayleigh-Taylor and tearing instabilities occurring in a magnetic accretion disk around a central neutron star. Against the first instability a toroidal magnetic field in the disk supports an enough mass near the magnetopause, while due to the second instability a radial field with a neutral sheet forms magnetic islands. We determine a critical density leading to the plasma instability and estimate a mass confined in one magnetic island, which can produce the necessary energy of type II X-ray bursts when it accretes onto a neutron star.

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