Solar quiescent prominences at 10.7 GHz

Details Solar quiescent prominences at 10.7 GHz Solar quiescent prominences at 10.7 GHz

Apr 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981natur.290..758b&link_type=abstract

Nature, vol. 290, Apr. 30, 1981, p. 758, 759. NSF-supported research.

Computer Science

1

H Alpha Line, Solar Prominences, Solar Radio Emission, Chromosphere, Microwaves, Solar Activity, Solar Eclipses, Solar Limb

Scientific paper

Observations at 10.7 GHz of a single solar filament during the eclipse of October 12, 1977 are reported. The quiescent filament was observed with the Stanford five-element fast interferometer, with a beamwidth of 15 arcsec at 2.8 cm, in order to synthesize a microwave spectroheliogram. The existence of a region of depressed radio brightness noted previously in the neighborhood of the filament is confirmed. Results favor a model of a narrow filament-associated emission feature embedded in a dark field associated with a low-density cavity, rather than one of a low-brightness radio filament. It is thus concluded that the deficit of coronal emission from the volume occupied by the filament must be compensated by extra emission from the filament, which must then have a higher brightness temperature than the undisturbed chromosphere.

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