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Title of Journal: Gen Relativ Gravit

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Abbravation: General Relativity and Gravitation

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Springer US

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DOI

10.1002/jps.3030310604

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1572-9532

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Viscoresistive MHD configurations of plasma in acc

Authors: Giovanni Montani Riccardo Benini
Publish Date: 2010/07/03
Volume: 43, Issue: 4, Pages: 1121-1140
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Abstract

We present a discussion of twodimensional magnetohydrodynamics MHD configurations concerning the equilibria of accretion disks of a strongly magnetized astrophysical object We set up a viscoresistive scenario which generalizes previous twodimensional analyses by reconciling the ideal MHD coupling of the vertical and the radial equilibria within the disk with the standard mechanism of the angular momentum transport relying on dissipative properties of the plasma configuration The linear features of the considered model are analytically developed and the nonlinear configuration problem is addressed by fixing the entire disk profile at the same order of approximation Indeed the azimuthal and electron force balance equations are no longer automatically satisfied when poloidal currents and matter fluxes are included in the problem These additional components of the equilibrium configuration induce a different morphology of the magnetic flux surface with respect to the ideal and simply rotating disk

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