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Table 3
Derived parameters of the studied stars.
| Parameter | vEHB-2 | vEHB-3 | vEHB-7 | Sun |
|---|---|---|---|---|
| Teff [K] | 24900 ± 1200 | 21000 ± 1200 | 21 200 ± 600 | |
| log(ɡ/1 cm s−2) | 4.81 ± 0.12 | 4.64 ± 0.04 | 4.70 ± 0.04 | |
| R [R⊙] | 0.34 ± 0.05 | 0.39 ± 0.06 | 0.33 ± 0.03 | |
| M [M⊙] | 0.27 ± 0.11 | 0.25 ± 0.08 | 0.20 ± 0.04 | |
| L [L⊙] | 40 ± 7 | 27 ± 5 | 20 ± 3 | |
| log εHe | −3.0 ± 0.2 | −3.3 ± 0.5 | −2.9 ± 0.2 | −1.07 |
| log εC | −4.5 ± 0.1 | −4.7 ± 0.2 | −4.9 ± 0.1 | −3.57 |
| log εN | −4.6 ± 0.1 | −4.4 ± 0.1 | −4.17 | |
| log εO | −4.6 ± 0.4 | −4.2 ± 0.2 | −3.31 | |
| log εMg | −5.3 ± 0.1 | −5.9 ± 0.1 | −4.40 | |
| log εAl | −6.0 ± 0.1 | −5.55 | ||
| log εSi | −5.1 ± 0.1 | −5.0 ± 0.1 | −4.6 ± 0.1 | −4.49 |
| log εCa | −6.0 ± 0.1 | −5.4 ± 0.8 | −5.66 | |
| log εFe | −3.8 ± 0.1 | −4.2 ± 0.2 | −4.50 | |
| υrad [km s−1] | 195±7 | 231 ± 4 | 227 ± 3 |
Notes. Solar abundances were taken from Asplund et al. (2009). Blank items denote values that were not determined.
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