Observations at 6 CM of the solar active region

Details Observations at 6 CM of the solar active region Observations at 6 CM of the solar active region

Oct 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975natur.257..465k&link_type=abstract

Nature, vol. 257, Oct. 9, 1975, p. 465-467. NASA-NSF-supported research.

Astronomy and Astrophysics

Astronomy

26

Circular Polarization, Microwave Emission, Radiant Flux Density, Radio Sources (Astronomy), Solar Activity, Solar Radio Emission, Data Reduction, Faculae, Magnetic Signatures, Radio Telescopes, Solar Observatories, Solar Radio Bursts, Solar Rotation, Sunspots

Scientific paper

Preliminary results are reported for the synthesis of a solar active region from observations with a synthesis radio telescope at a wavelength of 6 cm. Several individual sources are observed in the total-intensity and circular-polarization maps. These are shown to correspond to two large sunspots, two groups of small sunspots, and a plage. A magnetogram indicates that this active region had a bipolar structure with positive polarity concentrated on the main sunspots and negative polarity scattered over the plage and some of the small sunspots. It is noted that several radio bursts were recorded during the observation period and that one corresponded to a H-alpha flare near one of the sunspot groups.

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