Open Access
Fig. 6
Wavelength dependence of the ratio R21 of the equivalent widths of narrow DIBs (Table 2) in the lines of sight of HD 204827 and HD 183143 (Hobbs et al. 2008, 2009; Fan et al. 2019), replacing the equivalent widths of undetected DIBs by 3 mÅ in HD 183143 and 2 mÅ in HD 204827.
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