Other
Scientific paper
Dec 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988esasp.286..481c&link_type=abstract
In ESA, Seismology of the Sun and Sun-Like Stars p 481-486 (SEE N89-25819 19-92)
Other
1
Solar Activity Effects, Solar Granulation, Solar Oscillations, Stellar Models, Sun, Molecular Diffusion, Solar Cycles, Stellar Structure
Scientific paper
Two solar models were constructed, one with no diffusion of the atomic nuclei, and another including diffusive element separation. The opacity at the bottom of the convection zone was increased 15 to 20 percent (within its theoretical uncertainty) to obtain a few microHertz agreement with observed p-mode frequencies. Original helium mass fractions were 0.291 and 0.289 for the no-diffusion and diffusion models, respectively. The diffusion model evolved to a surface Y=0.256 at the solar age, and the original Z value of 0.0200 decreased to 0.0179. Agreement of l=0 and 2 p-mode frequency separations with those observed is good. The g-mode nonadiabatic solutions do not have equal period spacings until high radial order. The lowest order modes are more visible if they all have the same kinetic energy. High central temperatures produce over 9 SNUs from the B and 1.5 SNUs from the Be reactions. Models with iron condensed-out below the convection zone, and with WIMPs cooling the central regions to reduce the SNUs, agree less well with p-mode frequency separations.
Cox Arthur N.
Guzik Joyce Ann
Kidman Russell B.
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