Coronal structures observed at metric wavelengths with the Nancay radioheliograph

Details Coronal structures observed at metric wavelengths with the Nancay radioheliograph Coronal structures observed at metric wavelengths with the Nancay radioheliograph

Nov 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984esasp.220..263a&link_type=abstract

In ESA The Hydromagnetics of the Sun p 263-264 (SEE N85-25091 14-92)

Computer Science

1

Solar Corona, Solar Radio Bursts, Spectroheliographs, Photosphere, Solar Activity, Solar Magnetic Field

Scientific paper

Two-dimensional maps of the Sun at 169 MHz, obtained with a radioheliograph, with resolution of 1.5 by 4.2 in. are presented. Bright features on the maps are sources of noise storm continua, as evidenced by their position relative to active regions and by the occurrence of type 1 bursts. Weaker emission regions are associated with neutral lines of the photospheric magnetic field. No sources associated with extended quiescent filaments are found. Depressions on the maps correspond to coronal holes both in the equatorial region and near the poles. Results indicate that the notion of the slowly varying component at metric wavelengths may have to be reexamined, since sources of different nature may have been grouped in this component.

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