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Fig. 9
Example RV variations displayed by helium and metal lines. Fitted Gaussian profiles are over-plotted and rest wavelengths are indicated by the vertical dashed lines. Left-hand panel: He i 4437 Å, in which the “hot”, second component is noted by the marks above the continuum. Right-hand panel: Si iv 4089 Å and N iii 4097 Å.
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