Table 1
Programme stars and adopted atmospheric parameters.
| Name | Teff | log g | [Fe/H] | ξ | S∕N | Class | ||
|---|---|---|---|---|---|---|---|---|
| (K) | (cm s−2) | (dex) | (km s−1) | |||||
| No s-process enrichment | ||||||||
| HD 7863 | 4637 ± 64 | 2.29 ± 0.40 | −0.07 ± 0.05 | 1.26 ± 0.10 | 68 | No | ||
| 4561 ± 6 | 2.37 ± 0.01 | 0.13 ± 0.01 | 2 | – | Sr only | |||
| HIP 69788 | 5127 ± 11 | 3.90 ± 0.14 | −0.04 ± 0.04 | 0.61 ± 0.10 | 75 | No | ||
| 4913 ± 10 | 3.04 ± 0.02 | − 0.34 ± 0.01 | 2 | – | Sr-only | |||
| TYC 3144−1906−1 | 4136 ± 64 | 1.89 ± 0.50 | −0.13 ± 0.10 | 1.37 ± 0.04 | 48 | No (Li) | ||
| 4232 ± 8 | 1.87 ± 0.02 | 0.15 ± 0.01 | 2 | – | Sr only | |||
| TYC 4684−2242−1 | 4651 ± 20 | 2.70 ± 0.14 | −0.05 ± 0.07 | 1.15 ± 0.05 | 54 | No | ||
| 4652 ± 12 | 2.71 ± 0.03 | 0.05 ±0.02 | 2 | – | Sr only | |||
| Mild s-process enrichment | ||||||||
| BD − 07° 402 | 4654 ± 6 | 2.62 ± 0.19 | −0.11 ± 0.05 | 1.22 ± 0.10 | 61 | Mild (Li-rich) | ||
| 4688 ± 9 | 2.58 ± 0.02 | 0.11 ± 0.01 | 2 | – | Sr only | |||
| BD + 44° 575 | 4175 ± 6 | 1.50 ± 0.19 | −0.45 ± 0.05 | 1.60 ± 0.10 | 76 | Mild | ||
| 4202 ± 12 | 1.59 ± 0.03 | − 0.11 ± 0.02 | 2 | – | Sr only | |||
| TYC 22−155−1 | 4704 ± 9 | 3.10 ± 0.32 | −0.20 ± 0.10 | 1.04 ± 0.05 | 47 | Mild | ||
| 4629 ± 11 | 2.72 ± 0.03 | − 0.22 ± 0.01 | 2 | – | Sr only | |||
| TYC 2913−1375−1 | 4757 ± 69 | 2.00 ± 0.30 | −0.61 ± 0.11 | 1.45 ± 0.05 | 32 | Mild | ||
| 4791± 15 | 2.41± 0.04 | − 0.37 ± 0.02 | 2 | – | Sr only | |||
| TYC 3305−571−1 | 4816 ± 3 | 2.76 ± 0.16 | −0.05 ± 0.08 | 1.31 ± 0.04 | 49 | Mild | ||
| 4798 ± 8 | 2.62 ± 0.02 | 0.18 ± 0.01 | 2 | – | Sr only | |||
| TYC 752−1944−1 | 5069 ± 25 | 2.94 ± 0.05 | −0.08 ± 0.08 | 1.33 ± 0.04 | 61 | Mild | ||
| 4967 ± 11 | 2.79 ± 0.03 | 0.02 ± 0.01 | 2 | – | Sr only | |||
| TYC 4837−925−1 | 4679 ± 34 | 2.16 ± 0.29 | −0.27 ± 0.07 | 1.30 ± 0.04 | 44 | Mild | ||
| 4739 ± 14 | 2.46 ± 0.04 | 0.02 ± 0.02 | 2 | – | Sr only | |||
| TYC 3423−696−1 | 5042 ± 64 | 3.66 ± 0.30 | 0.02 ± 0.08 | 0.96 ± 0.04 | 55 | Mild | ||
| 5014 ± 17 | 3.59 ± 0.03 | 0.22 ± 0.02 | 2 | – | Sr only | |||
| Strong s-process enrichment | ||||||||
| TYC 2250−1047−1 | 5335 ± 25 | 3.71 ± 0.18 | −0.55 ± 0.12 | 1.45 ± 0.05 | 32 | Strong | ||
| 5097 ± 23 | 3.25 ± 0.03 | − 0.68 ± 0.03 | 2 | – | Ba only | |||
| TYC 2955−408−1 | 4716 ± 64 | 2.49 ± 0.3 | −0.39 ± 0.08 | 1.25 ± 0.04 | 61 | Strong | ||
| 4724 ± 10 | 2.39 ± 0.03 | − 0.21 ± 0.01 | 2 | – | Sr only | |||
| TYC 591−1090−1 | 5267 ± 36 | 3.68 ± 0.50 | −0.30 ± 0.12 | 1.18 ± 0.06 | 28 | Strong | ||
| 5106 ± 13 | 3.33 ± 0.02 | − 0.29 ± 0.01 | 2 | – | Ba only | |||
Notes. ξ is the microturbulence velocity. The column ‘S/N’ gives the signal-to-noise ratio (around 5000 Å) of the HERMES spectrum used for the abundance analysis. The column “class” indicates classification either from our study (first line), or from N19 on the second line. For the criteria used to classify stars as ‘no s-process’, ‘mild s-process enrichment’ and ‘strong s-process enrichment’, see Sect. 5.
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