Excerpt from our UVES spectra for the nine ACEPs. The black and red lines show the data and the best-fitting synthetic spectra, respectively. Some lines are labelled in the figure, as is the iron abundance. In the right panel, we show the fit of the Na I doublet at 5889–5895 Å. It is possible to note the interstellar sodium lines in four out of nine stars, for which we accurately fit only the line profile of the stellar sodium.