2007A&A...473L...9C

We determine the solar abundance of phosphorus using CO⁵BOLD 3D hydrodynamic model atmospheres. High-resolution, high signal-to-noise solar spectra of the PI lines of Multiplet 1 at 1051-1068#1 are compared to line-formation computations performed on a CO⁵BOLD solar model atmosphere. We find A(P)=5.46±0.04, in good agreement with previous analyses based on 1D model atmospheres, due to the PI lines of Mult. 1 not being affected much by 3D effects. We cannot confirm an earlier claim by other authors of a downward revision of the solar P abundance by 0.1dex when employing a 3D model atmosphere. Concerning other stars, we find modest (<0.1dex) 3D abundance corrections for P among four F-dwarf model atmospheres of different metallicities, and these corrections are largest at lowest metallicity. We conclude that 3D abundance corrections are generally rather small for the PI lines studied in this work. They are marginally relevant for metal-poor stars, but may be neglected in the Sun.