München 2019 – wissenschaftliches Programm

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EP: Fachverband Extraterrestrische Physik

EP 9: Poster

EP 9.9: Poster

Donnerstag, 21. März 2019, 16:30–19:00, Durchgangshalle

Flux rope formation by a confined solar flare preceding a coronal mass ejection — •Bernhard Kliem1, Jeongwoo Lee2, Rui Liu3, Stephen M. White4, Chang Liu5, and Satoshi Masuda61Institute of Physics and Astronomy, University of Potsdam, Germany — 2Kyung Hee Univ., Yongin, Republic of Korea — 3USTC, Hefei, China — 4AFRL, Albuquerque, NM, USA — 5NJIT, Newark, NJ, USA — 6Nagoya University, Japan

Two categories of onset mechanism for solar eruptions (coronal mass ejections [CMEs], filament or prominence eruptions, and flares) are currently being debated. Ideal MHD mechanisms suggest the instability of a magnetic flux rope, thus, must assume that a flux rope exists at eruption onset. Reconnection mechanisms assume that a (not yet verified) mechanism of self-amplifying magnetic reconnection commences in a sheared magnetic arcade, triggering and driving the eruption and forming a flux rope as a result. Here we analyze an eruption event which strongly indicates that a magnetic flux rope was formed prior to a major CME by a preceding confined flare (i.e. a flare not associated with a CME). We also present evidence that such flux-rope-forming precursor flares often occur prior to CMEs, which lends support to the ideal MHD mechanism for solar eruptions.

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