In black we show the average o‐H2D+(11,0–11,1) spectra obtained in each core (labeled at the top-right corner of each panel). The red histogram shows the best-fit obtained with MCWEEDS. The corresponding best-fit parameters are recorded in Table 2. Cores that overlap by at least 5% of their extension with another core are marked with a blue asterisk in the top-left corner of the panel.