Abstract
It is shown that depth-dependent departures from LTE such as obtained by Athay and Lites (1972) will not notably affect the solar curve-of-growth of Fe i. This implies that both abundance and microturbulence may be determined from this curve-of-growth assuming LTE, and excludes that microturbulence is an artefact produced by non-LTE effects.
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References
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Holweger, H. Microturbulence and the effect of departures from LTE on photospheric iron lines. Sol Phys 30, 35–37 (1973). https://doi.org/10.1007/BF00156170
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DOI: https://doi.org/10.1007/BF00156170