Physics
Scientific paper
Apr 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985soph...96..253m&link_type=abstract
Solar Physics (ISSN 0038-0938), vol. 96, April 1985, p. 253-275. Research supported by the Stichting Astronomisch Onderzoek in N
Physics
43
Coronal Loops, Current Sheets, Plasma Heating, Solar Corona, Solar Magnetic Field, X Ray Spectroscopy, Electrical Resistivity, H Alpha Line, Ion Acoustic Waves, Magnetic Field Configurations, Solar Flares, Solar Temperature, X Ray Sources
Scientific paper
A faint steadily emitting loop-like structure has been observed by HXIS (Hard X-Ray Imaging Spectrometer) in its low energy channels (3.5-8.0 keV) on November 5/6, 1980. These HXIS observations have permitted the authors to follow the thermal evolution of this loop for a period of about 15 hr and from this study they conclude that only a fraction of 0.1% of the volume of the loop is steadily heated at the rather large rate of 0.6 erg cm-3s-1. The authors identify the source of the X-ray emission in this paper with the Hα filament in the same region. The hot X-ray emitting plasma and the cool plasma radiating in Hα are thermally separated by the strong magnetic field. The main conclusion of the paper is that for the first time direct evidence is found for the steady dissipation of coronal magnetic fields via enhanced resistivity in thin current sheets.
Hoyng Peter
Martens Petrus C. H.
van den Oord H. J. G.
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