Physics
Scientific paper
Nov 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975sci...190..619u&link_type=abstract
Science, vol. 190, Nov. 14, 1975, p. 619-624.
Physics
23
Neutrinos, Solar Physics, Stellar Evolution, Stellar Luminosity, Astronomical Models, Climatology, Helium Isotopes, Paleoclimatology, Solar Activity Effects, Solar Atmosphere, Solar Interior
Scientific paper
Accepted stellar evolution theory implies a time scale of billions of years for changes in solar luminosity, but data on solar neutrinos detectable at the earth fail to support existing theory. The article examines the time scales of various solar processes (in days, years, up to billions of years) and several methods for detecting solar luminosity variations (terrestrial and Martian climatology and paleoclimatology, reflected brightness variations of Uranus and Neptune) and critically reviews the Opik and Dilke-Gough models accounting for possible solar luminosity variation. It is concluded that the time scale of solar luminosity change could be shorter than the age of the earth, or even of the order of thirty million years, but the theory of the solar interior available for predicting such variation 'remains in a confused state' and there is as yet no satisfactory explanation accounting for detectable solar neutrinos.
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