Large-scale patterns on the sun observed in the millimetric wavelength range

Details Large-scale patterns on the sun observed in the millimetric wavelength range Large-scale patterns on the sun observed in the millimetric wavelength range

Jan 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992soph..137...67v&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 137, Jan. 1992, p. 67-86. Research supported by Helsinki University of Technology.

Physics

14

Brightness Temperature, Millimeter Waves, Solar Activity, Temperature Distribution, H Alpha Line, Solar Prominences, Solar Temperature

Scientific paper

The nature and behavior of large-scale patterns on the solar surface, indicated by the areas of brightness-temperature depressions in the millimetric wavelength range, are studied. A large sample of 346 individual, low-temperature regions (LTRs) is employed to provide reliable statistical evidence. An association of 99 percent was found between the locations of LTRs and the large-scale magnetic field inversion lines, and 60 percent of the LTRs were associated with the inversion line filaments. A tentative physical association with filaments is reconsidered, and one particularly well-observed case is presented. The heights of the perturbers causing brightness-temperature depressions are discussed. The long-term evolution of the latitudinal distribution of LTRs is presented in a butterfly diagram.

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