The height structure of solar active regions at X-ray wavelengths as deduced from OSO-8 limb crossing observations

Details The height structure of solar active regions at X-ray wavelengths as deduced from OSO-8 limb crossing observations The height structure of solar active regions at X-ray wavelengths as deduced from OSO-8 limb crossing observations

Nov 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979soph...64..109m&link_type=abstract

Solar Physics, vol. 64, Nov. 1979, p. 109-119. Research supported by the Lockheed Independent Research Program;

Physics

7

Light Curve, Satellite Observation, Solar Activity, Solar X-Rays, Vertical Distribution, Data Acquisition, Oso-8, Plasma Temperature, Solar Limb, X Ray Telescopes

Scientific paper

Twenty limb crossing light curves of solar active region emission in the 1-4 keV energy band have been constructed from data gathered by the Lockheed Mapping X-Ray Heliometer experiment on OSO-8. These light curves indicate that 50% of the observed counts arise from heights below 20 000 km and 90% from heights below 57 000 km. The best fit is obtained for a model in which the emission density increases steadily down to the lowest observable levels, but the possibility of a small emission free gap at the base cannot be ruled out. On the average, the temperature of the plasma appears to be slightly higher at the base of a region than in its upper levels.

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