The diameter of the sun at decameter wavelengths |
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| Authors: | T E Gergely B D Gross M R Kundu |
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| Institution: | (1) Astronomy Program, University of Maryland, 20742 College Park, MD, U.S.A. |
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| Abstract: | Using observations obtained with the Clark Lake radioheliograph we determined the diameter of the Sun in the decameter wavelength range. Both equatorial and polar diameters increase with decreasing frequency, as D=Af
 . The eccentricity of the brightness distribution appears to remain constant in the frequency range (30–74 MHz) in good agreement with the optical results in a corresponding height range. The smaller size of the polar diameter is attributed to coronal holes covering the poles during the period of our observations, while streamers were observed at the equator most of the time. |
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