Fig. 3
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Distribution of magnesium I (blue solid trace), II (orange dashed trace) and III (green dash-dotted trace) along the Sun’s atmosphere (a), Epsilon Eridani (b), GJ 832 (c) and GJ 581 (d) using the base model. The heights at the temperature minimum (“Tmin”) and the beginning of the transition region (“T.Reg”) for each star are noted in light grey boxes and dotted lines.
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