Solar models with helium and heavy-element diffusion
نویسندگان
چکیده
منابع مشابه
Solar Models with Helium and Heavy Element Diiusion
Heavy element and helium diiusion are both included for the rst time in this series of papers on precise solar models. In addition, improvements in the input data for solar interior models are described for nuclear reaction rates, the solar luminosity, the solar age, heavy element abundances, radiative opacities, helium and metal diiusion rates, and neutrino interaction cross sections. The eeec...
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Heavy element and helium di usion are both included for the rst time in this series of papers on precise solar models. In addition, improvements in the input data for solar interior models are described for nuclear reaction rates, the solar luminosity, the solar age, heavy element abundances, radiative opacities, helium and metal di usion rates, and neutrino interaction cross sections. The e ec...
متن کاملHeavy Element Diffusion in Metal Poor Stars
Stellar evolution models which include the effect of helium and heavy element diffusion have been calculated for initial iron abundances of [Fe/H] = −2.3, −2.1, −1.9 and −1.7. These models were calculated for a large variety of masses and three separate mixing lengths, α = 1.50, 1.75 and 2.00 (with α = 1.75 being the solar calibrated mixing length). The change in the surface iron abundance for ...
متن کاملInfluence of heavy element and rotationally induced diffusions on the solar models
We present the results of solar model computation done with the latest Livermore opacities. Models without diffusion, with hydrogen diffusion only and with hydrogen and heavy elements diffusion are considered. The influence of mixing below the convective envelope induced by rotation and angular momentum losses is also discussed. The sound speed of our best model, does not deviate from that of B...
متن کاملThe Solar Heavy Element Abundances : II . Constraints from Stellar Atmospheres
Estimates of the bulk metal abundance of the Sun derived from the latest generation of model atmospheres are significantly lower than the earlier standard values. In Paper I we demonstrated that a low solar metallicity is inconsistent with helioseismology if the quoted errors in the atmospheres models (of order 0.05 dex) are correct. In this paper we undertake a critical analysis of the solar m...
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ژورنال
عنوان ژورنال: Reviews of Modern Physics
سال: 1995
ISSN: 0034-6861,1539-0756
DOI: 10.1103/revmodphys.67.781