Abstract
WE wish to report a number of measurements of the radiation from the Sun in a wavelength range centred at 1.2 mm which show a large amount of solar activity. Since the discovery by Newstead (unpublished work) of an active region at 1.2 mm we have made a more detailed localized study of the solar disk. This has shown measurable activity on a considerable fraction of the days on which observations have been made, and may indicate a long term increase of solar activity at these wavelengths perhaps associated with the increase of the sunspot cycle.
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References
Gary, B., Stacey, J., and Drake, F. D., Ap. J. Suppl. 108, 12, 239 (1965).
Daily Map of the Sun, April 5, 1968, Fraunhofer Institut, Freiburg.
Waldmeier, M., Z. für Ap., 20, 195 (1940).
Lyot, B., Ann. d'Ap., 7, 31 (1944).
Dollfus, A., CR Acad. Sci., 247, 42 (1953).
Jarrett, A. H., and Von Kluber, H., Mon. Not. Roy. Astro. Soc., 115, 343 (1955).
Allen, C. W., Astrophysical Quantities, second ed., 174 (Athlone Press, 1963).
Bruzek, A., Solar Physics, 399, Proc. NATO Study Institute, Athens, 1965 (Interscience, 1967).
Maxwell, A., and Thomson, A. R., Ap. J., 135, 138 (1962).
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CLARK, C., PARK, W. Localized Solar Enhancement at 1.2 mm Wavelength. Nature 219, 922–924 (1968). https://doi.org/10.1038/219922a0
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DOI: https://doi.org/10.1038/219922a0
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