Line of Mo in BD–18 5550. Crosses represent the observations. The synthetic profiles were computed with an absence of Mo (red dash-dotted line, here practically at the position of the continuum), the adopted abundance A(Mo) = –1.4 (red thick line), and changing this abundance by ± 0.3 dex (blue thin lines for A(Mo) = –1.7 and –1.1).
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