Solar oxygen abundance

Motivated by the controversy over surface metallicity of Sun, we present a re-analysis solar photospheric oxygen (O) abundance. New atomic models O and Ni are used to perform Non-Local Thermodynamic Equilibrium (NLTE) calculations with 1D hydrostatic (MARCS) 3D hydrodynamical (Stagger Bifrost) models. The Bifrost MHD simulations quantify influence chromosphere. We compare NLTE line profiles new high-resolution, R = 700 000, spatially-resolved spectra Sun obtained using IAG FTS instrument. find that I lines at 777 nm yield abundance log A(O) 8.74 +/- 0.03 dex, which depends on choice H-impact collisional data oscillator strengths. forbidden [O I] 630 is less model-dependent, as it forms nearly in LTE only weakly sensitive convection. However, strength for this transition more uncertain than lines. Modelled blend, yields an 8.77 0.05 dex. our results previous estimates literature draw conclusion most likely value abundance, estimate 8.75