Are all CMEs Flux Ropes?

Details Are all CMEs Flux Ropes? Are all CMEs Flux Ropes?

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006spd....37.0809k&link_type=abstract

American Astronomical Society, SPD meeting #37, #8.09; Bulletin of the American Astronomical Society, Vol. 38, p.232

Astronomy and Astrophysics

Astronomy

Scientific paper

A specific quantitative parameterization of athree-dimensional flux rope is examined statistically forcomparison to previously-published statistical measures ofcoronal mass ejections (CMEs). The three dimensionalgeometry, which was previously shown to reproducestatistical measures of flux-rope CME images[1], is basedon a ``hollow'' pre-eruption density structure[2]extrapolated into the corona. In a previous study[1], wedetermined quantitative parameters for the flux-ropegeometry, based on observations of CMEs exhibiting aflux-rope morphologies. In the new study, the previousrestriction on morphology is lifted and statisticalmeasures of the parameterized flux rope, taken fromensembles of synthetic coronagraph images, are comparedto statistical results from observations of general CMEpopulations[3,4]. In particular, we address thestatistical occurrence of so-called candidate disconnectionevents[4] in cases where no disconnection occurs.[1] Krall and St. Cyr, submitted to ApJ[2] Krall and Chen 2005, ApJ, 628, 1046[3] Burkepile et al. 2004, JGR, 109, doi:10.1029/2003JA010149[4] Webb et al. 2003, JGR, 108, doi:10.1029/2003JA009923Supported by NASA and ONR

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