Table 2
Line by line abundances of Sr and Ba in the programme stars.
| [Sr I/H] | [Sr II/H] | [Ba II/H] | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| λ(Å) | 4607.33 | 4811.88 | 7070.07 | 4077.08 | 4215.52 | 4524.92 | 4554.03 | 4934.08 | 5853.67 | 6141.67 | ||
| Arcturus | −1.05 (0.27) | −0.82 | ||||||||||
| No s-process enrichment | ||||||||||||
| HD 7863 | −0.27 (0.2) | −0.27 | −0.27 | −0.17: | – | 0.12 | −0.18: | – | −0.18 | −0.18 | ||
| – | – | – | 0.9 | 0.9 | – | 0.0 | 0.1 | – | – | |||
| HIP 69788 | −0.22 (0.1) | 0.13 | – | −0.17: | – | – | 0.12: | 0.12: | 0.12 | – | ||
| – | – | – | 0.7 | 0.5 | – | 0.7 | 0.4 | – | – | |||
| TYC 3144−1906−1 | – | −0.12 | −0.02 | −0.17: | – | – | 0.12: | 0.12: | −0.18 | −0.18 | ||
| – | – | 1.0 | 1.0 | – | 0.2 | 0.0 | – | – | ||||
| TYC 4684−2242−1 | −0.57 (0.2) | – | −0.02 | 0.13: | – | – | 0.12: | 0.12: | 0.02 | 0.02 | ||
| – | – | – | 0.9 | 0.9 | – | −0.1 | 0.0 | – | – | |||
| Mild s-process enrichment | ||||||||||||
| BD − 07°402 | −0.27 (0.2) | 0.12 | −0.17 | 0.13: | – | – | 0.12: | 0.22: | 0.1 | 0.1 | ||
| – | – | – | 0.9 | 1.0 | – | 0.0 | −0.1 | – | – | |||
| BD +44°575 | – | −0.2 | −0.17 | −0.17: | – | – | 0.12: | 0.12: | −0.2 | – | ||
| – | – | – | 0.9 | 0.8 | – | −0.2 | −0.1 | – | – | |||
| TYC 22−155−1 | −0.37 (0.2) | −0.2 | 0.13 | −0.17: | – | 0.3: | 0.12: | 0.12: | 0.1 | 0.1 | ||
| – | – | – | 0.5 | 0.5 | – | −0.2 | −0.3 | – | – | |||
| – | – | – | 0.2 | 0.4 | – | −0.3 | −0.5 | – | – | |||
| TYC 2913−1375−1 | (a)– | – | – | – | – | – | −0.18 | −0.03: | −0.68 | −0.68 | ||
| – | – | – | 0.2 | 0.4 | – | −0.3 | −0.5 | – | – | |||
| TYC 3305−571−1 | 0.30 (0.2) | – | 0.13: | – | – | – | 0.42: | – | 0.32 | 0.32 | ||
| – | – | – | 0.9 | 0.9 | – | 0.2 | 0.1 | – | – | |||
| TYC 752−1944−1 | 0.03 (0.1) | – | 0.43 | – | – | – | 0.62: | 0.62: | 0.52 | 0.52 | ||
| – | – | – | 0.8 | 0.8 | – | 0.3 | 0.0 | – | – | |||
| TYC 4837−925−1 | −0.27(0.2) | – | 0.13 | −0.17: | – | – | 0.12: | 0.12: | −0.18 | −0.18 | ||
| – | – | – | 0.8 | 0.8 | – | 0.0 | −0.1 | – | – | |||
| TYC 3423−696−1 | 0.53: (0.1) | 0.43 | – | −0.17: | – | – | 0.12: | 0.12: | 0.0 | 0.1 | ||
| – | – | – | 0.8 | 0.9 | – | 0.1 | 0.2 | – | – | |||
| Strong s-process enrichment | ||||||||||||
| TYC 2250−1047−1 | 0.33 (0.2) | 0.73 | – | – | – | 0.62 | 0.82: | 0.82: | 0.62 | 0.62 | ||
| – | – | – | −0.8 | −0.7 | – | 0.3 | 0.3 | – | – | |||
| TYC 2955−408−1 | 0.03 (0.2) | – | 0.43 | 0.13: | – | 0.6 | 0.52: | 0.52: | 0.52 | 0.52 | ||
| – | – | – | 0.7 | 0.6 | – | 0.2 | -0.2 | – | – | |||
| TYC 591−1090−1 | −0.07 (0.1) | – | – | – | – | 0.9 | 0.82: | 0.82: | 0.6 | – | ||
| – | – | – | 0.5 | −0.4 | – | 0.7 | 0.7 | – | – | |||
Notes. The first line for each star provides [X/H] abundances from the present paper, and the second line those from N19, which were converted from the original [X/Fe] data using N19 metallicity (as listed in Table 1). [Sr I/H] is the Sr abundance derived from Sr I lines, and similarly for Sr II and Ba II. For the Sun, we adopted log ϵ⊙ (Sr) = 2.87 ± 0.07 and log ϵ⊙ (Ba) = 2.18 ± 0.09, according to Asplund et al. (2009). The value between parentheses in column [Sr I/H] λ 4607.327 is the NLTE correction according to Bergemann et al. (2012), and the Sr abundance listed in that column is NLTE-corrected. For the criteria used to classify stars as ‘no s-process’, ‘mild s-process enrichment’ and ‘strong s-process enrichment’, see Sect. 5. (a)See discussion in Sect. 6.
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