TY  - GEN
A1  - Kliem, Bernhard
A1  - Rust, S.
A1  - Seehafer, Norbert
T1  - Helicity transport in a simulated coronal mass ejection
T2  - Postprints der Universität Potsdam : Mathematisch Naturwissenschaftliche Reihe
N2  - 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.
T3  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 569 
KW  - magnetic fields
KW  - MHD
KW  - coronal mass ejections
KW  - magnetohydrodynamics
KW  - sun
Y1  - 2019
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/41290
UR  - https://nbn-resolving.org/urn:nbn:de:kobv:517-opus4-412907
SN  - 1866-8372
IS  - 569
SP  - 125
EP  - 128
ER  -