Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992pasj...44l.211t&link_type=abstract
PASJ: Publications of the Astronomical Society of Japan (ISSN 0004-6264), vol. 44, no. 5, p. L211-L214.
Astronomy and Astrophysics
Astronomy
56
Magnetic Field Reconnection, Solar Corona, Solar Magnetic Field, Spaceborne Astronomy, X Ray Telescopes, Japanese Spacecraft, Solar X-Rays
Scientific paper
We present an example of the large-scale 'restructuring' of a polar coronal magnetic structure taking place over a time period of 20 hr. A large-scale closed-loop arcade appears to be created from an open field structure formed in association with the disappearance of a polar crown filament. The loops increase their height with time. The loop formation propagates westward, and a cusp structure, inside of which is bright in X-rays, is seen on the west limb. This global structural change of the coronal magnetic field appears to take place only through a non-explosive, quasi-steady magnetic reconnection. The Yohkoh soft X-ray images show that the solar corona is full of such global restructuring, suggesting that magnetic reconnection is a primary device for the general coronal magnetic evolution.
Acton Loren W.
Bruner Marilyn E.
Harvey Karen L.
Ogawara Yoshiaki
Takahashi Tetsuo
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