Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...260..342e&link_type=abstract
Astrophysical Journal, Part 1, vol. 260, Sept. 1, 1982, p. 342-352.
Astronomy and Astrophysics
Astrophysics
12
Convective Flow, Energy Transfer, Periodic Variations, Solar Constant, Solar Diameter, Stellar Luminosity, Mixing Length Flow Theory, Perturbation Theory, Radiative Transfer, Stellar Evolution, Stellar Structure
Scientific paper
The response of solar models to perturbations of the efficiency of convective energy transport is studied. Such perturbations primarily affect the shallow superadiabatic layer of the convective envelope. Independent of the details of the perturbation scheme, the resulting change in the solar radius is always very small compared to the change in luminosity. This appears to be true for any physical mechanism of solar variability which operates in the outer layers of the convection zone. Changes of the solar radius have been inferred from historical observations of solar eclipses in 1715 and 1925. Considering the constraints on concurrent luminosity changes, this type of solar variability must be indicative of changes in the solar structure at substantial depths below the superadiabatic layer of the convective envelope.
Endal Andrew S.
Twigg Laurence W.
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