TY  - JOUR
A1  - Hassanin, Alshaimaa
A1  - Kliem, Bernhard
A1  - Seehafer, Norbert
A1  - Török, Tibor
T1  - A model of homologous confined and ejective eruptions involving kink instability and flux cancellation
T2  - The astrophysical journal : an international review of spectroscopy and astronomical physics
N2  - In this study, we model a sequence of a confined and a full eruption, employing the relaxed end state of the confined eruption of a kink-unstable flux rope as the initial condition for the ejective one. The full eruption, a model of a coronal mass ejection, develops as a result of converging motions imposed at the photospheric boundary, which drive flux cancellation. In this process, parts of the positive and negative external flux converge toward the polarity inversion line, reconnect, and cancel each other. Flux of the same amount as the canceled flux transfers to a flux rope, increasing the free magnetic energy of the coronal field. With sustained flux cancellation and the associated progressive weakening of the magnetic tension of the overlying flux, we find that a flux reduction of approximate to 11% initiates the torus instability of the flux rope, which leads to a full eruption. These results demonstrate that a homologous full eruption, following a confined one, can be driven by flux cancellation.
Y1  - 2022
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/62342
SN  - 2041-8205
SN  - 2041-8213
VL  - 929
IS  - 2
PB  - IOP Publ. Ltd.
CY  - Bristol
ER  -