From the Initial to the Present Sun
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There is evidence on Earth that the sun has shone for more than 3000 million years with about the same luminosity. From radioactive decay in different materials of the solar system, one nowadays assumes that it was formed 4.65 × 109 years ago. Since then, the sun has lived on hydrogen burning, predominantly according to the pp chain, and its interior has been appreciably enriched in 4He. In the following we show how a model of the present sun can be constructed.
KeywordsSolar Neutrino Solar Model Helium Content Neutrino Flux Hydrogen Burning
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