Left: best-fit versus the SN_Ia fraction for all the possible combinations of (AGB+SN_cc+SN_Ia) yield models, fitted on the averaged X-IFU mock abundance ratios (see text). Combinations using (i) both SN_cc and SN_Ia models from the input cosmological simulations (blue stars), (ii) one of these models (for either SN_cc or SN_Ia; yellow circles), and (iii) neither of these models (pink squares) are shown separately. The black arrow shows the “input” combination detailed in Fig. 1 and discussed in Sect. 3.1. The white area delimitates realistic observational constraints previously obtained on the SN_Ia fraction contributing to the enrichment (see text). The dashed red line shows the “statistically acceptable” models (, see text). The list of best-fit models is provided in Table 3. Right: distribution of the same combinations. The same colour code as the left panel is applied.