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The Chemical Composition of the Sun

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arxiv 2503.05402 v1 pith:2NZGMHGC submitted 2025-03-07 astro-ph.SR astro-ph.EPastro-ph.GA

The Chemical Composition of the Sun

classification astro-ph.SR astro-ph.EPastro-ph.GA
keywords solarcompositionchemicalchapterdataobtainedresultssystem
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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This chapter provides a brief introduction to the chemical composition of the Sun. The focus of the chapter is on results obtained from the physical analysis of the solar photosphere. Data obtained from meteorites, solar wind and corona measurements, as well as helioseismology, and solar neutrinos are briefly reviewed. The elemental and isotopic composition of the solar system is derived by combining the solar and meteoritic data. The cosmochemical and astronomical abundance scales are described. The results of the determinations of the protosolar chemical composition, as well as the initial and present-day mass fractions of hydrogen, helium, and metals (X, Y, Z) for the solar system are presented in extensive tables. All tables are also available in machine-readable form via Zenodo https://doi.org/10.5281/zenodo.14988840

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  1. Is the composition of the Solar atmosphere unusual, and if so, why? Possible interpretations

    astro-ph.SR 2025-09 conditional novelty 3.0

    A review of the 10-20% solar volatile-to-refractory excess relative to solar twins, weighing galactic, protoplanetary, and planetary-ingestion explanations and finding no decisive answer.