Table 5.
Abundances in the S stars o1 Ori (top panel) and 57 Peg (bottom panel).
| o1 Ori | |||||
|---|---|---|---|---|---|
| MARCS model: | |||||
| Teff = 3500 K, log g = 0.0, [Fe/H] = −0.50, C/O = 0.50, [s/Fe] = 0.00 | |||||
| Z | X | log ϵX | [X/H] | [X/Fe] | N |
| 6 | C | 8.06 | −0.37 | 0.13 | |
| 7 | N | 7.4 | −0.4 | 0.07 ± 0.63 | |
| 26 | Fe | 7.0 ± 0.13 | −0.5 | ±0.16 | 12 |
| 39 | Y | 1.8 ± 0.00 | −0.41 | 0.09 ± 0.00 | 2 |
| 40 | Zr | 2.45 ± 0.07 | −0.13 | 0.37 ± 0.07 | 2 |
| 41 | Nb | 1.02 ± 0.17 | −0.44 | 0.06 ± 0.17 | 4 |
| 56 | Ba | 1.8 ± 0 | −0.4 | 0.12 ± 0.10 | 1 |
| 60 | Nd | 1.0 ± 0 | −0.4 | 0.08 ± 0.20 | 2 |
| 57 Peg | |||||
| MARCS model: | |||||
| Teff = 3400 K, log g = 1.0, [Fe/H] = 0.00, C/O = 0.50, [s/Fe] = 0.00 | |||||
| 6 | C | 8.16 | −0.27 | −0.07 | |
| 7 | N | 8.60 | 0.77 | 0.97 ± 0.63 | |
| 26 | Fe | 7.25 ± 0.14 | −0.25 | ±0.17 | 13 |
| 39 | Y | 1.95 ± 0.07 | −0.26 | 0.04 ± 0.07 | 2 |
| 40 | Zr | 2.45 ± 0.21 | −0.13 | 0.12 ± 0.21 | 2 |
| 56 | Ba | 2.0 ± 0 | −0.18 | 0.07 ± 0.10 | 1 |
| 60 | Nd | 1.4 ± 0 | −0.02 | 0.23 ± 0.20 | 2 |
| 62 | Sm | 0.85 ± 0.21 | −0.11 | 0.14 ± 0.21 | 2 |
Notes. The column labeled N gives the number of lines used to derive the corresponding abundances. The uncertainty listed in the log ϵX column corresponds to the line-to-line scatter, whereas the one listed in column [X/Fe] is the root mean square of the former value and the uncertainty propagating from the model-atmosphere uncertainties, as estimated for V915 Aql by Shetye et al. (2018; their Table 8). V915 Aql has atmospheric parameters similar to those of o1 Ori and 57 Peg.
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