Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...216..940c&link_type=abstract
Astrophysical Journal, Part 1, vol. 216, Sept. 15, 1977, p. 940-946.
Astronomy and Astrophysics
Astrophysics
Magnetic Flux, Skylab Program, Solar Magnetic Field, Solar X-Rays, Electrical Resistivity, Force-Free Magnetic Fields, Magnetic Measurement, Magnetic Poles, Photosphere, Solar Corona
Scientific paper
The Skylab S-056 and S-082A experiments and ground-based magnetograms have been used to study the role of bright X-ray arcs and the emergence of solar magnetic flux in the McMath region 12476. The S-056 X-ray images show a system of one or sometimes two bright arcs within a diffuse emitting region. The arcs seem to directly connect regions of opposite magnetic polarity in the photosphere. Magnetograms suggest the possible emergence of a magnetic flux. The width of the main arc is approximately 6 arcsec when most clearly defined, and the length is approximately 30-50 arcsec. Although the arc system is observed to vary in brightness over a period exceeding 24 hours, it remains fixed in orientation. The temperature of the main arc is approximately 3 x 10 to the 6th K. It is suggested that merging magnetic fields may provide the primary energy source, perhaps accompanied by resistive heating from a force-free current.
Broussard Robert M.
Chapman Gary A.
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