Filament Kinking and Its Implications for Eruption and Re-formation

Details Filament Kinking and Its Implications for Eruption and Re-formation Filament Kinking and Its Implications for Eruption and Re-formation

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007soph..245..287g&link_type=abstract

Solar Physics, Volume 245, Issue 2, pp.287-309

Physics

22

Filament, Kinking, Eruption, Reformation

Scientific paper

Solar filaments exhibit a range of eruptive-like dynamic activity from the full, or partial, eruption of the filament mass and surrounding magnetic structure, as a CME, to a fully confined dynamic evolution or “failed” eruption, sometimes producing a flare but no CME. Additionally, observations of erupting filaments often show a clear helical structure, indicating the presence of a magnetic flux rope. Dynamic helical structures, in addition to being twisted, frequently show evidence of being kinked, with the axis of the flux rope exhibiting a large-scale writhe. Motivated by the fact that kinking motions are also detected in filaments that fail to erupt, we investigate the possible relationship between the kinking of a filament and its success or failure to erupt. We present an analysis of kinking in filaments and its implications for other filament phenomena such as the nature of the eruption, eruptive acceleration, and post-eruptive re-formation. We elucidate the relationship between kinking and the various filament phenomena via a simple physical picture of the forces involved in kinking together with specific definitions of the types of filament eruption. The present study offers results directly applicable to observations, allowing a thorough exploration of the implications of the observational relationship between kinking and filament phenomena and provides new insight for modelers of CME initiation.

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