Letter to the Editor
The solar photospheric abundance of phosphorus: results from CO5BOLD 3D model atmospheres *
GEPI, Observatoire de Paris, CNRS, Université Paris Diderot, Place Jules Janssen, 92190 Meudon, France e-mail: Elisabetta.Caffau@obspm.fr
2 Astrophysikalisches Institut Potsdam, An der Sternwarte 16, 14482 Potsdam, Germany
3 CIFIST Marie Curie Excellence Team
4 Istituto Nazionale di Astrofisica, Osservatorio Astronomico di Trieste, via Tiepolo 11, 34143 Trieste, Italy
Accepted: 11 August 2007
Aims.We determine the solar abundance of phosphorus using CO5BOLD 3D hydrodynamic model atmospheres.
Methods.High-resolution, high signal-to-noise solar spectra of the P i 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 analyses based on 1D model atmospheres, due to the P i 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 0.1 dex when employing a 3D model atmosphere. Concerning other stars, we find modest (<0.1 dex) 3D abundance corrections for P among four F-dwarf model atmospheres of different metallicities, and these corrections are largest at lowest metallicity.
Conclusions.We conclude that 3D abundance corrections are generally rather small for the P i lines studied in this work. They are marginally relevant for metal-poor stars, but may be neglected in the Sun.
Key words: Sun: abundances / stars: abundances / hydrodynamics
© ESO, 2007