Helicity transport in a simulated coronal mass ejection

  • It has been suggested that coronal mass ejections (CMEs) remove the magnetic he-licity of their coronal source region from the Sun. Such removal is often regarded to be necessary due to the hemispheric sign preference of the helicity, which inhibits a simple annihilation by reconnection between volumes of opposite chirality. Here we monitor the relative magnetic he-licity contained in the coronal volume of a simulated flux rope CME, as well as the upward flux of relative helicity through horizontal planes in the simulation box. The unstable and erupting flux rope carries away only a minor part of the initial relative helicity; the major part remains in the volume. This is a consequence of the requirement that the current through an expanding loop must decrease if the magnetic energy of the configuration is to decrease as the loop rises, to provide the kinetic energy of the CME.

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Metadaten
Author details:Bernhard KliemORCiDGND, S. Rust, Norbert SeehaferORCiD
URN:urn:nbn:de:kobv:517-opus4-412907
DOI:https://doi.org/10.25932/publishup-41290
ISSN:1866-8372
Title of parent work (English):Postprints der Universität Potsdam : Mathematisch Naturwissenschaftliche Reihe
Publication series (Volume number):Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe (569)
Publication type:Postprint
Language:English
Date of first publication:2019/02/05
Publication year:2010
Publishing institution:Universität Potsdam
Release date:2019/02/05
Tag:MHD; coronal mass ejections; magnetic fields; magnetohydrodynamics; sun
Issue:569
Number of pages:4
First page:125
Last Page:128
Source:Proceedings of the International Astronomical Union 6 (2010) Symposium 274, pp. 125-128 DOI 10.1017/S1743921311006715
Organizational units:Mathematisch-Naturwissenschaftliche Fakultät
DDC classification:5 Naturwissenschaften und Mathematik / 52 Astronomie / 520 Astronomie und zugeordnete Wissenschaften
Peer review:Referiert
Publishing method:Open Access
Grantor:Cambridge University Press (CUP)
License (German):License LogoKeine öffentliche Lizenz: Unter Urheberrechtsschutz
External remark:Bibliographieeintrag der Originalveröffentlichung/Quelle
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