Abstract

The solar argon abundance cannot be directly derived by spectroscopic observations of the solar photosphere. The solar argon abundance is evaluated from solar wind measurements, nucleosynthetic arguments, observations of B stars, H II regions, planetary nebulae, and noble gas abundances measured in Jupiter's atmosphere. These data lead to a recommended argon abundance of N(Ar) = 91,200 ± 23,700 (on a scale where Si = 106 atoms). The recommended abundance for the solar photosphere [on a scale where log N(H) = 12] is A(Ar)photo = 6.50 ± 0.10, and taking element settling into account, the solar system (protosolar) abundance is A(Ar)solsys = 6.57 ± 0.10.

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