The Role of Magnetic Flux Ropes in CMEs

Details The Role of Magnetic Flux Ropes in CMEs The Role of Magnetic Flux Ropes in CMEs

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..sh41c05a&link_type=abstract

American Geophysical Union, Spring Meeting 2001, abstract #SH41C-05 INVITED

Physics

2111 Ejecta, Driver Gases, And Magnetic Clouds, 7513 Coronal Mass Ejections, 7524 Magnetic Fields, 7531 Prominence Eruptions

Scientific paper

A commonly-held belief is that prominences/filaments are magnetic flux ropes, consisting of a globally twisted structure with a number of turns. These ropes are presumed to form either by emerging pre-made from the photosphere, or via reconnection at the bottom boundary of the corona. The claim is that filament eruption and coronal mass ejections occur because the twist/helicity of the flux rope becomes too large. We will argue that this so-called paradigm is merely an unfortunate misconception. The key point is that flux ropes do not produce CMEs but, instead, CMEs produce flux ropes. We will present both observational and theoretical results, which demonstrate that the pre-eruption topology is that of a differentially sheared arcade and that the flux ropes observed in the upper corona by LASCO, for example, are only a by-product of the eruption. We will discuss the implications of these results for the STEREO and SOLAR-B missions. This work supported in part by NASA and ONR.

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