On the solar nickel and oxygen abundances

Simple item page
dc.creatorScott, Pat
dc.creatorAsplund, Martin
dc.creatorGrevesse, Nicolas
dc.creatorSauval, A. Jacques
dc.date2008-11-05
dc.date2009-01-27
dc.date.accessioned2026-07-07T12:34:20Z
dc.date.available2026-07-07T12:34:20Z
dc.descriptionDeterminations of the solar oxygen content relying on the neutral forbidden transition at 630 nm depend upon the nickel abundance, due to a Ni I blend. Here we rederive the solar nickel abundance, using the same ab initio 3D hydrodynamic model of the solar photosphere employed in the recent revision of the abundances of C, N, O and other elements. Using 17 weak, unblended lines of Ni I together with the most accurate atomic and observational data available we find log epsilon_Ni = 6.17 +/- 0.02 (statistical) +/- 0.05 (systematic), a downwards shift of 0.06 to 0.08 dex relative to previous 1D-based abundances. We investigate the implications of the new nickel abundance for studies of the solar oxygen abundance based on the [O I] 630 nm line in the quiet Sun. Furthermore, we demonstrate that the oxygen abundance implied by the recent sunspot spectropolarimetric study of Centeno & Socas-Navarro needs to be revised downwards from log epsilon_O = 8.86 +/- 0.07 to 8.71 +/- 0.10. This revision is based on the new nickel abundance, application of the best available gf-value for the 630 nm forbidden oxygen line, and a more transparent treatment of CO formation. Determinations of the solar oxygen content relying on forbidden lines now appear to converge around log epsilon_O = 8.7.
dc.descriptionv2 matches published version
dc.identifierhttps://arxiv.org/abs/0811.0815
dc.identifierhttp://arxiv.org/abs/0811.0815
dc.identifierApJL 691 (2009) L119
dc.identifierdoi:10.1088/0004-637X/691/2/L119
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/217390
dc.subjectAstrophysics
dc.titleOn the solar nickel and oxygen abundances
dc.typetext

Files

Collections

arXiv