The solar photospheric abundance of phosphorus: results from co5bold 3D model atmospheres

TL;DR

This study determines the solar phosphorus abundance using 3D hydrodynamic models, finding minimal 3D effects on the PI lines and confirming previous abundance estimates, with slight corrections for metal-poor stars.

Contribution

First detailed analysis of solar phosphorus abundance using co5bold 3D models, confirming previous 1D results and assessing 3D effects across different stellar metallicities.

Findings

Solar phosphorus abundance is A(P)=5.46±0.04.

3D effects on PI lines are minimal for the Sun.

Modest 3D abundance corrections are found for metal-poor stars.

Abstract

aims: We determine the solar abundance of phosphorus using co5bold 3D hydrodynamic model atmospheres. method: High resolution, high signal-to-noise solar spectra of the PI lines of Multiplet 1 at 1051-1068 nm are compared to line formation computations performed on a co5bold solar model atmosphere. results: We find A(P)=5.46+- 0.04, in good agreement with previous analysis based on 1D model atmospheres, due to the fact that the PI lines of Mult. 1 are little affected by 3D effects. We cannot confirm an earlier claim by other authors of a downward revision of the solar P abundance by 0.1 dex employing a 3D model atmosphere. Concerning other stars, we found modest (<0.1 dex) 3D abundance corrections for P among four F dwarf model atmospheres of different metallicity, being largest at lowest metallicity. conclusions: 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.