Astronomy and Astrophysics – Astronomy
Scientific paper
May 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...210.5806g&link_type=abstract
American Astronomical Society Meeting 210, #58.06; Bulletin of the American Astronomical Society, Vol. 39, p.168
Astronomy and Astrophysics
Astronomy
Scientific paper
Coronal mass ejections (CMEs) and their associated space weather manifestations are routinely interpreted as possessing a helical magnetic flux rope structure. An ongoing controversy remains, however, as to whether a precursor flux rope exists as a coronal equilibrium state prior to eruption, or whether it is formed during eruption. This is an important question to resolve, since CME initiation models and space weather predictions depend upon a clear understanding of the configuration of pre-CME magnetic fields and their evolution during eruption. We will describe an alternative which lies between the two extremes of a totally erupting, pre-existing rope, and a rope that forms completely in situ during eruption, i.e., a precursor flux rope that splits in two and reconnects with surrounding fields during eruption. We consider the implications of such a "partially-expelled flux rope" model for a range of CME-related observations, including partially-erupting filaments, the evolution of post-flare loops and flare ribbon morphologies, and transient coronal holes.
Fan Ying
Gibson Sarah
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