2008ApJ...674..607L

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 logN(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.