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Fig. 4
Line profiles of [O I], [Ca II], and Mg I] in velocity space. Zero velocities are with respect to 6300 Å, 7308 Å, and 4571 Å, respectively. The fluxes of [Ca II] and Mg I] lines are normalized to the [O I] line. The synthetic Mg I] line profile is represented with dash-dotted line (see text for details).
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