000002336 001__ 2336
000002336 005__ 20160701171704.0
000002336 0247_ $$2DOI$$a10.1088/0004-637X/691/2/L119
000002336 037__ $$aASTROimport-493
000002336 100__ $$aScott, P.
000002336 245__ $$aOn the Solar Nickel and Oxygen Abundances
000002336 260__ $$c2009
000002336 520__ $$aDeterminations of the solar oxygen content relying on the neutral forbidden transition at 630 nm depend upon the nickel abundance, due to a Ni I blend. Here, we rederive the solar nickel abundance, using the same ab initio three-dimensional hydrodynamic model of the solar photosphere employed in the recent revision of the abundances of C, N, O, and other elements. Using 17 weak, unblended lines of Ni I together with the most accurate atomic and observational data available, we find log epsilonNi = 6.17 ± 0.02(statistical) ± 0.05(systematic), a downward shift of 0.06-0.08 dex relative to previous abundances based on one-dimensional model atmospheres. We investigate the implications of the new nickel abundance for studies of the solar oxygen abundance based on the [O I] 630 nm line in the quiet Sun. Furthermore, we demonstrate that the oxygen abundance implied by the recent sunspot spectropolarimetric study of Centeno  Socas-Navarro needs to be revised downward from log epsilonO = 8.86 ± 0.07 to 8.71 ± 0.10. This revision is based on the new nickel abundance, the application of the best available gf value for the 630 nm forbidden oxygen line, and a more transparent treatment of CO formation. Determinations of the solar oxygen content relying on forbidden lines now appear to converge around log epsilonO = 8.7. 
000002336 700__ $$a Asplund, M.
000002336 700__ $$a Grevesse, N.
000002336 700__ $$a Sauval, A. J.
000002336 773__ $$cL119-L122$$i2$$pThe Astrophysical Journal$$v691$$y2009
000002336 85642 $$ahttp://esoads.eso.org/abs/2009ApJ...691L.119S
000002336 905__ $$apublished in
000002336 980__ $$aREFERD