Revisiting the statistical equilibrium of H− in stellar atmospheres

Open Access

Fig. 5

Effect on the spectrum (continuum and Fe II lines) in the visual, roughly 400–800 nm, for a model with T_eff = 7000 K, log 𝑔 = 4.0, and [Fe/H] = 0. The upper plot shows the emergent flux at the stellar surface 𝓕_λ. The blue line shows H⁻ treated in non-LTE (𝓕_λ), and the dotted red line shows it in LTE $(ℱ_{λ}^{LTE})$ $\left( {{\cal F}_\lambda ^{{\rm{LTE}}}} \right)$ . The lower panel shows the ratio $ℱ_{λ} / ℱ_{λ}^{LTE}$ ${{\cal F}_\lambda }/{\cal F}_\lambda ^{{\rm{LTE}}}$ .

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