An active prominence observed at centimeter wavelengths with the RATAN-600 radio telescope

Details An active prominence observed at centimeter wavelengths with the RATAN-600 radio telescope An active prominence observed at centimeter wavelengths with the RATAN-600 radio telescope

Oct 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978pazh....4..463b&link_type=abstract

(Pis'ma v Astronomicheskii Zhurnal, vol. 4, Sept.-Oct. 1978, p. 463-466.) Soviet Astronomy Letters, vol. 4, Sept.-Oct. 1978, p.

Astronomy and Astrophysics

Astronomy

2

Centimeter Waves, Radio Telescopes, Solar Activity, Solar Prominences, H Alpha Line, Microwave Emission, Solar Observatories

Scientific paper

The RATAN 600 radio telescope was used to observe the radiation from an active prominence northeast of the solar disk at five wavelengths in the centimeter range. One-dimensional radio images of this prominence at wavelengths of 2.0, 2.3, 2.7, 3.2, and 4.0 cm are presented. It is shown that: (1) the prominence consisted of a weak feature 50 arcsec across and a strong feature with an angular size of 1.6 arcmin; (2) the distance separating the two features was about 2 arcmin and independent of wavelength; (3) the antenna temperature was approximately the same at all five wavelengths and amounted to about 600 K for the strong feature and 160 K for the weak feature; and (4) the strong feature was 124,000 km above the limb, while the weak feature was 40,000 km above the limb. The radio results are compared with H-alpha observations, an upper limit of 2% is placed on the polarization for the strong feature, and a particle density of approximately 3 billion per cu cm is computed for the prominence.

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