Table 3.
Median metallicity ([M/H]) values and their standard deviation estimates from Escala et al. (2020), Escala et al. (2022), and D23, and the predicted values for the equivalent regions in the simulated M31 remnant.
| Region | D23 | Escala et al. (2020, 2022) | Component 1 [C1] | Component 2 [C2] | Component 3 [C3] | Component 4 [C4] | ||||
|---|---|---|---|---|---|---|---|---|---|---|
| Main | Sec | Main | Sec | Main | Sec | Main | Sec | |||
| Giant Stellar Stream | −0.37 ± 0.72 | −0.52 ± 0.45 | −0.79 ± 0.52 | −0.49 ± 0.31 | −0.78 ± 0.59 | −0.61 ± 0.36 | −0.56 ± 0.50 | −0.53 ± 0.38 | −0.74 ± 0.37 | −0.60 ± 0.33 |
| NE Shelf | −0.35 ± 0.75 | −0.44 ± 0.37 | −0.65 ± 0.49 | −0.60 ± 0.41 | −0.50 ± 0.48 | −0.45 ± 0.36 | – | – | – | – |
| W Shelf | −0.43 ± 0.90 | – | −0.56 ± 0.51 | −0.45 ± 0.36 | −0.89 ± 0.55 | −0.55 ± 0.39 | – | – | – | – |
Notes. For Escala et al. (2020), we used Equation (1) from Bhattacharya et al. (2021) to convert [Fe/H] values into [M/H] taking into account the relative α-enhancement within the field. For Escala et al. (2022) we calculated the average photometric metallicity (and its standard deviation) of the six fields within the NE shelf. For modelled stars, the median and the standard deviation values for each component of the substructures are separately presented for main and secondary stellar particles.
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