Diffusion time scales and accretion in the sun

Details Diffusion time scales and accretion in the sun Diffusion time scales and accretion in the sun

Mar 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977natur.266..433m&link_type=abstract

Nature, vol. 266, Mar. 31, 1977, p. 433, 434. Research supported by the National Research Council of Canada and Ministere de l'E

Astronomy and Astrophysics

Astronomy

17

Abundance, Diffusion Theory, Interplanetary Dust, Particle Diffusion, Stellar Mass Accretion, Astronomical Models, Comets, Convective Flow, Radiation Pressure, Solar Spectra, Solar Wind, Transport Properties, Turbulent Diffusion

Scientific paper

It is noted that accretion and subsequent diffusion of cometary material or dust grains by the sun could have produced the observed solar surface abundances. Diffusion theory is used to determine the minimum mass of the convection zone such that transport processes at its base do not affect abundances within it. This mass is found to be between 0.003 and 0.01 solar mass. A general expression is given for the diffusion time scale as a function of convection-zone mass.

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