A study of coronal bright points at 20 CM wavelength

Details A study of coronal bright points at 20 CM wavelength A study of coronal bright points at 20 CM wavelength

Mar 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988soph..117...37n&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 117, no. 1, 1988, p. 37-50.

Astronomy and Astrophysics

Astronomy

4

Brightness Temperature, Solar Corona, Very Large Array (Vla), Extreme Ultraviolet Radiation, Radio Astronomy, Solar Granulation

Scientific paper

The authors present the results of a study of coronal bright points (B.P.) observed at 20 cm with the VLA on a day when the Sun was exceptionally quiet. Microwave maps of B.P. were obtained using data for the entire observing period of 5 hours, as well as for shorter periods of a few minutes. Most B.P., especially those appearing in the full-period maps appear to be associated with small bipolar structures on the photospheric magnetogram. Overlays of B.P. maps on the Ca+K picture, show that the brightest part of a B.P. tends to lie on the boundary of a supergranulation network. In general, the bright points exhibit rapid variations in intensity. There is no systematic correlation between the size of a B.P. and its intensity; the apparently slow variation of B.P. emission may have rapid fluctuations superimposed on it.

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