Convection in the sun.

Abstract

view Abstract Citations (1) References Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Convection in the sun. Swihart, Thomas L. Abstract It is well known that a radiative model of the solar atmosphere has a negative density gradient in the moderately deep layers. The minimum convection in the sun would thus be that amount which would remove this negative gradient. The maximum convection would be found by using the adiabatic temperature gradient in the unstable layers. The above described atmospheres, as well as a purely radiative atmosphere, were constructed on the Los Alamos IBM 704 calculator, and the resulting radiation fields were compared with observations. The adiabatic model was considerably superior to the other two in reproducing observed limb-darkening values and the resulting temperature-optical depth relation, and it was also somewhat better in reproducing absolute monochromatic intensities at the center of the disc; however it predicted a Balmer discontinuity of only o.o6, while the minimum convective and the radiative models had o.o8 and 0.11 respectively. Instability according to the Schwarzschild criterion sets in at an optical depth (X5ooo) of o.8 for the adiabatic model and about 1.1 for the minimum convective model. Los Alamos Scientific Laboratory, University of Calsfornia, Los Alamos, N. M. Publication: The Astronomical Journal Pub Date: 1959 DOI: 10.1086/108018 Bibcode: 1959AJ.....64R.133S full text sources ADS |