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“Sweeping Pinch” Mechanism and the Acceleration of Jets in Astrophysics

Published online by Cambridge University Press:  04 August 2017

Yutaka Uchida  and
Kazunari Shibata
Yutaka Uchida
Affiliation:
Tokyo Astronomical Observatory, University of Tokyo
Kazunari Shibata
Affiliation:
Dept. Earth Science, Aichi University of Education

Abstract

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A magnetodynamic mechanism of jet formation, in which a packet of the toroidal component of the magnetic field Bϕ plays a role, is proposed. Such a packet of toroidal field, produced by the rotational motion in the β=Pg/Pm≫1 region, relaxes itself in the β≪1 region when brought up into such a region, for example, by the process of flux emergence due to magnetic buoyancy. In the β≪1 region, a progressive pinch is caused by this relaxation and the mass is swept out by the pinch near the axis and also by the j x B force in the twisted field region surrounding the axis.

Type
Session IV
Information
Symposium - International Astronomical Union , Volume 107: Unstable Current Systems and Plasma Instabilities , 1985 , pp. 287 - 291
Copyright
Copyright © Reidel 1985 

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