Fig. 13.

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Hε four-panel diagrams for the locations marked with crosses in Fig. 12. Top row: Hε synthesized in 1.5D. Bottom row: same location synthesized in 3D. Top left panels: relative χν/τν; sensitive to velocity gradients. Top right panels: Sν; relative source function. Yellow colormap for negative source function values. Light blue colormap for positive source function values. Solid white: total source function at rest wavelength. Dashed yellow: Hε source function. Dashed blue: background source function. Source functions are displayed in brightness temperature units with the scale at the top. Solid grey: ratio of Hε to total extinction (if Hε extinction dominates the grey curve is on the left side of the plot; if Ca II H extinction dominates on the right). Dotted red: atmospheric temperature profile. Bottom left panels: relative τνe( − τν); indicates where most of the contribution to relative line intensity comes from. Solid green: ϵBν(Te). Solid violet: σJν. Solid gold: ηBν(T⋆). The three terms are displayed in brightness temperature units with the scale at the top. Bottom right panels: CI; contribution to relative line depression/emission. Yellow colormap contribution to line depression. Light blue colormap contribution to line emission. Solid white: Ca II H plus Hε line profile. Dashed white: Ca II H background line profile. Solid red: atmospheric upward velocity profile. Solid light blue: τ = 1 height.
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