The evolution of the solar 'constant'

Details The evolution of the solar 'constant' The evolution of the solar 'constant'

Jun 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980orli...10..105n&link_type=abstract

(College Park Colloquium on Chemical Evolution: Limits of Life, 4th, College Park, Md., Oct. 18-20, 1978.) Origins of Life, vol.

Mathematics

Logic

Biological Evolution, Earth (Planet), Solar Constant, Solar Flux, Solar Terrestrial Interactions, Convective Heat Transfer, Helium, Hydrogen, Interstellar Matter, Planetary Evolution, Solar Atmosphere, Solar Interior, Stellar Luminosity, Stellar Mass Accretion, Time Dependence

Scientific paper

Variations in solar luminosity over geological time are discussed in light of the effect of the solar constant on the evolution of life on earth. Consideration is given to long-term (5 - 7% in a billion years) increases in luminosity due to the conversion of hydrogen into helium in the solar interior, temporary enhancements to solar luminosity due to the accretion of matter from the interstellar medium at intervals on the order of 100 million years, and small-amplitude rapid fluctuations of luminosity due to the stochastic nature of convection on the solar surface. It is noted that encounters with dense interstellar clouds could have had serious consequences for life on earth due to the peaking of the accretion-induced luminosity variation at short wavelengths.

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