Properties of the Reconnecting Current Sheets in CME/Flare Events

Details Properties of the Reconnecting Current Sheets in CME/Flare Events Properties of the Reconnecting Current Sheets in CME/Flare Events

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009spd....41.2215l&link_type=abstract

American Astronomical Society, SPD meeting #41, #22.15

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Scientific paper

Analyzing the data from the UVCS and other instruements on board SOHO, we studied the plasma features of the current sheet observed in various temperatures. The results suggest thick current sheet with small interior structures, which implies the development of plasma instabilities in the sheet. Direct measurements yielded the sheet thickness d between 5.0 × 104 and 4.6 × 105 km, increasing with both time and altitude. The possibility that large apparent d result from projection effects is examined and rejected. We derive theoretical scaling laws relating d to other observables that corroborate this conclusion and thus help confine both d and ηe to a reasonable range. The possible impact of our results on the existing models of particle acceleration in reconnecting current sheets is also briefly discussed.

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