The Magnetic Helicity Sign of Filament Chirality |
|
Jongchul Chae Submitted: 2000-10-13 15:24
A solar prominence has either dextral or sinistral chirality depending on its
axial field direction. We determine the magnetic helicity sign of filaments
using high-resolution observations performed by Transition Region And
Coronal Explorer. At EUV wavelengths, filaments sometimes appear as
mixtures of bright threads and dark threads. This characteristic has
enabled us to discern overlying threads and underlying ones and to
determine the sign of magnetic helicity based on the assumption that the
helicity sign of two crossing thread segments is the same as that of the
filament. Our results support the notion that dextral filaments have
negative magnetic and that sinistral filaments have positive helicity.
Authors: Chae, J.
Projects:
|
Publication Status: The Astrophysical Journal, 540:L115-L118,2000 September 10
Last Modified: 2000-10-13 15:24
|
 
 
 
 
|
|