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The Quiet Sun at cm- and mm-Wavelengths

Published online by Cambridge University Press:  14 August 2015

E. Fürst
E. Fürst*
Affiliation:
Astronomy Program, University of Maryland College Park, Maryland
*
*Permanent Address: Max-Planck Institut für Radioastronomie Bonn, Germany

Extract

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Soon after the first detection of radio emission from the sun two components of the solar radio radiation were identified: The emission related to active centres on the disk and the radiation of the undisturbed, static solar atmosphere, in which the active regions are embedded. The undisturbed component is observed to vary only slightly during the solar sunspot cycle, it is called the emission of the quiet sun. A theoretical estimate of this component was first given by Martyn (1946) and subsequently developed in more detail by many other authors. The basic observations were performed with poor angular resolution. Still at present most experimental data are taken with angular resolutions of about 1 to 4 arc min, too low to discriminate between the different solar atmospheric fine structures, clearly seen in various spectral lines. The quiet component of the solar radio radiation therefore represents the average emission of an inhomogenous solar atmosphere.

Type
Session I - Quiet Sun
Information
Symposium - International Astronomical Union , Volume 86: Radio Physics of the Sun , 1980 , pp. 25 - 39
Copyright
Copyright © Reidel 1980 

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