Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsh12a..05p&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #SH12A-05
Astronomy and Astrophysics
Astrophysics
[7511] Solar Physics, Astrophysics, And Astronomy / Coronal Holes, [7513] Solar Physics, Astrophysics, And Astronomy / Coronal Mass Ejections, [7524] Solar Physics, Astrophysics, And Astronomy / Magnetic Fields, [7531] Solar Physics, Astrophysics, And Astronomy / Prominence Eruptions
Scientific paper
The aim of this work is to understand the relationship between coronal holes, coronal hole boundaries and one of the other main features of the coronal magnetic field, namely filament channels, regions of highly sheared magnetic fields overlying photospheric polarity reversal boundaries. The well developed filament channel is a necessary ingredient for the filament formation. Polar coronal holes and polar crown filament channels always seem to exist together, and even during periods of weakest activity, when nothing indicates the presence of polar crown channels on the solar disk, polar crown prominences appear at the limb proving their existence. Does a similar symbiotic relationship exist also for other coronal holes? There is some indication that for middle and low latitude coronal holes different configurations occur depending on the polarity of the hole relative to the pole. If the polarity is the same, then a coronal pseudostreamer configuration can form with twin filament channels at its base, while if the polarity is opposite, the right conditions for the development of the filament channels and filaments following the hemispheric helicity rule arise. Using STEREO/EUVI, SDO/AIA and HMI instruments we trace the formation and mutual evolution of coronal holes and their symbiotic filament channels up to and including filament formations, eruptions and subsequent reformations during many solar rotations in 2010-2011.
Berger Mitchell A.
Martin Sara F.
Panasenco Olga
Velli M. M.
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