PUGLIESE, Daniela and MONTANI. Morphology of two-dimensional MRI in axial symmetry. Journal of Plasma Physics. US - Spojené státy americké, 2015, vol. 81, No 6, p. "495810604-1"-"495810604-9", 9 pp. ISSN 0022-3778. Available from: https://dx.doi.org/10.1017/S0022377815001142.
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Basic information
Original name Morphology of two-dimensional MRI in axial symmetry
Authors PUGLIESE, Daniela and MONTANI.
Edition Journal of Plasma Physics, US - Spojené státy americké, 2015, 0022-3778.
Other information
Original language English
Type of outcome Article in a journal
Field of Study 10305 Fluids and plasma physics
Confidentiality degree is not subject to a state or trade secret
WWW URL
Organization unit Institute of physics in Opava
Doi http://dx.doi.org/10.1017/S0022377815001142
UT WoS 000367574600013
Keywords in English accretion disks; magneto-hydrodynamics; plasma phenomena
Tags
Tags International impact, Reviewed
Changed by Changed by: Mgr. Pavlína Jalůvková, učo 25213. Changed: 30/3/2021 12:44.
Abstract
In this paper, we analyse the linear stability of a stellar accretion disk having a stratified morphology. The study is performed in the framework of ideal magneto-hydrodynamics and therefore results in a characterization of the linear unstable magneto-rotational modes. The peculiarity of the present scenario consists of adopting the magnetic flux function as the basic dynamical variable. Such a representation of the dynamics allows us to take account of the co-rotation theorem as a fundamental featureof the ideal plasma equilibrium and to evaluate its impact on the perturbation evolution. According to the Alfvenic nature of the magneto-rotational instability, we consider an incompressible plasma profile and perturbations propagating along the background magnetic field. Furthermore, we develop a local perturbation analysis around fiducial coordinates of the background configuration and deal with very small-scale linear dynamics in comparison to the background inhomogeneity size. The m
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