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

Elisabetta Caffau (1) , Matthias Steffen (2) , Luca Sbordone (1, 3) , Hans-G. Ludwig (1, 3) , Piercarlo Bonifacio (1, 3, 4)

1 GEPI - Galaxies, Etoiles, Physique, Instrumentation
2 AIP - Astrophysikalisches Institut Potsdam
3 CIFIST - Cosmological Impact of the First Stars
4 OAT - INAF - Osservatorio Astronomico di Trieste

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.

Mots clés: Sun: abundances; Stars: abundances; Hydrodynamics

Domaines: Cosmologie et astrophysique extra-galactique [astro-ph.CO]

Elisabetta Caffau, Matthias Steffen, Luca Sbordone, Hans-G. Ludwig, Piercarlo Bonifacio. The solar photospheric abundance of phosphorus: results from co5bold 3D model atmospheres. 2007. ⟨hal-00166923⟩