Computer Science
Scientific paper
Jun 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986ncimc...9..714r&link_type=abstract
Nuovo Cimento C, Serie 1 (ISSN 0390-5551), vol. 9 C, May-June 1986, p. 714-724.
Computer Science
1
Abundance, Helium, Metallicity, Solar Neutrinos, Solar Oscillations, Cosmic Rays, Cosmology, Solar Atmosphere, Solar System, Stellar Composition
Scientific paper
The observational estimates of the presolar abundance of helium (Ys) are reviewed and a lower value of Ys (approximately equal to 0.19 by mass fraction) is suggested to solve the solar-neutrino problem. With this reduced value of Ys it is argued from the point of view of maintaining the luminosity of the sun at its observed level that the metallicity requirement is Zs approximately equal to 0.013. Previous workers, while considering lower Ys in the range of 0.15-0.20, have assumed Zs in the range of either 0.018-0.020 or 0.001-0.004. It is suggested that for Ys = 0.15-0.20, one should rather consider Zs = 0.01-0.02 in order to obtain a global solution that explains the observed modes of solar oscillation as well as the observed neutrino flux. This solution is quite interesting as it is found that the real uncertainties in the determination of the solar metallicity arising from the diversity in existing models of the solar atmosphere suggest Zs approximately equal to 0.018 + or 0.005.
Rana Narayan C.
Wilkinson D. A.
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