J 2015

Morphology of two-dimensional MRI in axial symmetry

PUGLIESE, Daniela and MONTANI

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

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10305 Fluids and plasma physics

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

Organization unit

Institute of physics in Opava

UT WoS

000367574600013

Keywords in English

accretion disks; magneto-hydrodynamics; plasma phenomena

Tags

Tags

International impact, Reviewed
Změněno: 30/3/2021 12:44, Mgr. Pavlína Jalůvková

Abstract

V originále

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