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On the linear stability of magnetized jets without current sheets - non-relativistic case

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Title On the linear stability of magnetized jets without current sheets - non-relativistic case
 
Creator KIM, JH
BALSARA, DS
LYUTIKOV, M
KOMISSAROV, SS
GEORGE, D
SIDDIREDDY, PK
 
Subject BLANDFORD-ZNAJEK MECHANISM
BLACK-HOLE MAGNETOSPHERES
GALACTIC RADIO-SOURCES
FORCE-FREE JETS
RELATIVISTIC JETS
MAGNETOHYDRODYNAMIC SIMULATIONS
INSTABILITY
STARS
FIELD
instabilities
MHD
methods: numerical
stars: jets
galaxies: jets
 
Description In this paper we consider stability of magnetized jets that carry no net electric current and do not have current sheets. The non-relativistic magnetohydrodynamics equations are linearized around the background velocity and the magnetic field structure of the jet. The resulting linear equations are solved numerically inside the jet. We find that introduction of current-sheet-free magnetic field significantly improves jet stability relative to unmagnetized jets or magnetized jets with current sheets at their surface. This particularly applies to the fundamental pinch and kink modes - they become completely suppressed in a wide range of long wavelengths that are known to become most pernicious to jet stability when the evolution enters the non-linear regime. The reflection modes, both for the pinch and kink instability, also become progressively more stable with increased magnetization.
 
Publisher OXFORD UNIV PRESS
 
Date 2016-01-15T08:27:01Z
2016-01-15T08:27:01Z
2015
 
Type Article
 
Identifier MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 450(1)982-997
0035-8711
1365-2966
http://dx.doi.org/10.1093/mnras/stv606
http://dspace.library.iitb.ac.in/jspui/handle/100/18162
 
Language en