next up previous
Next: Flare - Associated Radio Up: Solar Bag Numbers Previous: Large-Scale

Hemispheric Patterns of Chirality

Phenomenon Property North(South) Hem. Chir. comment ref
Filament channel $\mbox{dextral}^1$ (sinistral) channel $\equiv$ fibrils along PIL [Zi97]
`` barbs right(left)-bearing 'highway exit ramps;' end in minority flux [Zi97]
`` X-ray arcades ccw (cw) loop axes axes rotate w/height [Zi97]
`` field lines as left(right)-hand screw assumes ``flux rope'' model -
active region (AR) soft x-ray loops N(S)-shaped ``sigmoid'' shapes are prone to erupt -
AR vec. mag'grams current helicity negative (positive) this is ${\bf J \cdot B}$, not ${\bf A \cdot B}$ [Zi97]
sunspot penumbrae fibril whorls ccw (cw) whorls rare: in $\sim 5$% of spots [Zi97]
magnetic clouds twist left(right)-handed interplanetary, measured in-situ [Zi97]
[Zi97]

1. dextral $\equiv$ axial field points to right when viewed from region where normal magnetic field is positve.


next up previous
Next: Flare - Associated Radio Up: Solar Bag Numbers Previous: Large-Scale
Brian Welsch 2001-03-01