Observation of a coronal hole at 85 GHz

Details Observation of a coronal hole at 85 GHz Observation of a coronal hole at 85 GHz

Aug 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976soph...49..267k&link_type=abstract

Solar Physics, vol. 49, Aug. 1976, p. 267-269.

Physics

8

Brightness Temperature, Electron Density (Concentration), Solar Corona, Solar Temperature, Very Low Frequencies, X Ray Spectra, Electron Energy, Millimeter Waves, Optical Thickness, Solar Atmosphere

Scientific paper

A coronal hole was observed at 85 GHz (3.5 mm) on Nov. 24, 1970, when a spectacular coronal hole was observed in soft X-rays. The millimeter counterpart of the hole is much weaker and less widespread than in X-rays. The brightness temperature inside the hole was in most places about 100 to 200 K lower than the mean brightness temperature of the sun at 85 GHz.

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