Abstract
THE recent discovery of solar radio noise, in the range 30-1,000 megacycles, raises the question whether lower frequencies may not also exist. Variable magnetic fields exist on the sun and probably in the stars as well. Small and rapid pulsations of spot fields may well occur, even though detection of the variations, by studies of the Zeeman effect, will prove difficult. Nevertheless, we may expect that these changing fields will produce electromagnetic radiations the maximum wave-lengths of which are comparable to stellar dimensions. Such low-frequency radiation will escape from the sun in the presence of a steady magnetic field, like those found in sunspots.
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MENZEL, D., SALISBUBY, W. Audio-Frequency Radio Waves from the Sun. Nature 161, 91 (1948). https://doi.org/10.1038/161091a0
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DOI: https://doi.org/10.1038/161091a0
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