Fig. 6.
Relation between the total oxygen abundance for the sample of He II emitters and the fraction of absorbed photons (left panel) and the ionization parameter (right panel) as derived from HCM-TEFF. Different symbols represent objects with (blue triangles) or without (orange circles) the WR bump in their spectra. Filled symbols represent objects for which O/H was calculated using the [O III] λ4363 Å, while empty symbols represent objects for which O/H was not calculated using this line.
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