Multifrequency radio observations of coronal holes, filaments and cavities on RATAN-600

Details Multifrequency radio observations of coronal holes, filaments and cavities on RATAN-600 Multifrequency radio observations of coronal holes, filaments and cavities on RATAN-600

Oct 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990an....311..371b&link_type=abstract

Astronomische Nachrichten (ISSN 0004-6337), vol. 311, no. 6, 1990, p. 371-373.

Astronomy and Astrophysics

Astronomy

3

Coronal Holes, Radio Observation, Solar Atmosphere, Solar Prominences, Solar Radio Emission, Geomagnetism, Radio Telescopes, Solar Terrestrial Interactions

Scientific paper

On the basis of solar radio observations made using the RATAN-600 radio telescope with high spatial resolution at nine wavelengths in the 2-32-cm range it is shown that filaments and cavities are well detected on solar scans as the regions of low radio brightness with angular dimensions of 25-80 arcsec in E - W direction. The tendency of decreasing radio sizes for cavities and filaments from 2.0 to 8.0 cm is observed. The coronal hole (CH) has more contrast in the range 8-32 cm. The radio size of CH in E - N direction increases from 2 arcmin (at 8.2 cm) to 5.0 arcmin (at 31.6 cm).

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