Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009apj...693.1666l&link_type=abstract
The Astrophysical Journal, Volume 693, Issue 2, pp. 1666-1677 (2009).
Astronomy and Astrophysics
Astronomy
17
Diffusion, Sun: Coronal Mass Ejections: Cmes, Sun: Flares, Sun: Magnetic Fields, Turbulence
Scientific paper
A discussion of the thickness of current sheets in solar eruptions, d, led Lin et al. in 2007 to estimate very large values for the effective resistivity, η e . Here, we address some questions raised by that paper. We apply the limb synoptic map technique and find d between 5.0 × 104 and 4.6 × 105 km, increasing with both time and altitude. The possibility that large apparent d and η e 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 η e 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.
Ko Kyeong Yeon
Li Jiying
Lin Juhn-Jong
Raymond John C.
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