Table 4
Stellar parameters and elemental abundances for our sample of six debris disc-hosting stars.
| Element | HD 21997 | 49Ceti | HD 131835 | HD 138813 | HD 110058 | HD 32297 | Sco-Cen | Sun |
|---|---|---|---|---|---|---|---|---|
| C | −3.48 ± 0.09 | −3.54 ± 0.06 | −3.47 ± 0.05 | −3.56 ± 0.20(*) | −3.61 ± 0.12 | −3.50 ± 0.08 | −3.70 ± 0.19 | −3.57 |
| N | −3.83 ± 0.20 | −4.17 ± 0.29 | −4.17 | |||||
| O | −3.30 ± 0.11 | −3.12 ± 0.07 | −3.30 ± 0.02 | −3.37 ± 0.03 | −3.49 ± 0.20(*) | −3.31 ± 0.08 | −3.40 ± 0.19 | −3.31 |
| Na | – | −5.77 ± 0.20(*) | – | – | – | −6.08 ± 0.20(*) | −5.82 ± 0.25 | −5.76 |
| Mg | −4.41 ± 0.11 | −4.39 ± 0.24 | −4.43 ± 0.10 | −4.51 ± 0.10 | −5.34± 0.06 | −4.74 ± 0.14 | −4.51 ± 0.20 | −4.40 |
| Al | – | −5.32 ± 0.20(*) | −5.68 ± 0.20(*) | −5.41 ± 0.20(*) | −6.46 ± 0.20(*) | −6.28 ± 0.20(*) | −6.01 ± 0.17 | −5.55 |
| Si | −4.39 ± 0.16 | −4.20 ± 0.16 | −4.34 ± 0.10 | – | −5.12± 0.11 | −4.77 ± 0.14 | −4.54 ± 0.33 | −4.49 |
| S | −4.97 ± 0.10 | −4.65 ± 0.04 | −4.81 ± 0.01 | – | −5.28 ± 0.11 | −5.24 ± 0.07 | −4.90 ± 0.17 | −4.88 |
| Ca | −5.70 ± 0.08 | −5.74 ± 0.11 | −5.68 ± 0.13 | −5.67 ± 0.07 | −6.89 ± 0.06 | −6.02 ± 0.08 | −5.71 ± 0.19 | −5.66 |
| Sc | −8.94 ± 0.09 | −8.92 ± 0.08 | −8.96 ± 0.06 | −9.02± 0.13 | −9.59 ± 0.09 | −9.09 ± 0.14 | −9.11 ± 0.25 | −8.85 |
| Ti | −7.03 ± 0.17 | −6.97 ± 0.08 | −7.04 ± 0.20 | −7.10± 0.07 | −8.07 ± 0.19 | −7.38 ± 0.11 | −7.22 ± 0.19 | −7.05 |
| V | – | – | – | – | −8.51 ± 0.20(*) | −7.96 ± 0.20(*) | −8.35 ± 0.23 | −8.07 |
| Cr | −6.29 ± 0.15 | −6.27 ± 0.13 | −6.44 ± 0.21 | −6.33 ± 0.17 | −7.38 ± 0.20 | −6.81 ± 0.11 | −6.41 ± 0.21 | −6.36 |
| Mn | −6.63 ± 0.14 | −6.44 ± 0.34 | −6.52 ± 0.18 | – | −7.21 ± 0.08 | −7.13 ± 0.13 | −6.83 ± 0.28 | −6.57 |
| Fe | −4.61 ± 0.02 | −4.56 ± 0.01 | −4.54 ± 0.04 | −4.50 ± 0.07 | −5.65 ± 0.06 | −4.99 ± 0.02 | −4.56 ± 0.15 | −4.50 |
| Ni | −5.87 ± 0.23 | −5.95 ± 0.16 | −5.80 ± 0.20 | −5.62± 0.06 | −6.52± 0.19 | −6.23 ± 0.04 | −5.97 ± 0.20 | −5.78 |
| Cu | −7.59 ± 0.20(*) | – | – | – | −8.20 ± 0.20(*) | −8.02 ± 0.20(*) | −8.28 ± 0.28 | −7.81 |
| Zn | −7.56 ± 0.20(*) | −7.65 ± 0.20(*) | – | – | −8.09 ± 0.20(*) | −7.96 ± 0.20(*) | −7.89 ± 0.25 | −7.44 |
| Sr | – | – | – | – | −10.21 ± 0.20(*) | – | −9.04 ± 0.34 | −9.13 |
| Y | −9.60 ± 0.20 | – | −9.61 ± 0.20(*) | – | −10.41 ± 0.30 | −10.30 ± 0.20(*) | −9.76 ± 0.25 | −9.79 |
| Ba | −9.82 ± 0.10 | −9.98 ± 0.11 | −9.88 ± 0.20(*) | −10.08 ± 0.20(*) | −11.16 ± 0.20(*) | −10.07 ± 0.10 | −9.71 ± 0.32 | −9.82 |
| La | – | – | – | – | −12.01 ± 0.20(*) | −11.30 ± 0.20(*) | −10.89 ± 1.18 | −10.90 |
| Teff | 8440 ± 100 | 8970 ± 100 | 8550 ± 90 | 9300 ± 90 | 7880 ± 80 | 8060 ± 90 | ||
| log g | 4.30 ± 0.15 | 4.19 ± 0.15 | 4.15 ± 0.20 | 4.22 ± 0.17 | 4.00 ± 0.05 | 4.25 ± 0.13 | ||
| ν sin i | 70.4 ± 0.9 | 196.9 ± 2.1 | 106.2 ± 1.1 | 136.2 ± 1.5 | 154.8 ± 2.8 | 90.1 ± 0.4 | ||
| νmic | 2.9 ± 0.4 | 2.5 ± 0.2 | 3.0 ± 0.5 | 2.4 ± 0.3 | 3.0 ± 0.2 | 2.9 ± 0.2 | ||
Notes. The median abundance of the hot Sco-Cen sample (Table 5) and the Solar abundances are also listed for reference. Abundances are in log(Nel/NH). The (*) mark indicates abundance estimates from a single absorption line, with a typical uncertainty of 0.20 dex assigned. The Sco- Cen column is the median abundance of the hot star sample of Sco-Cen association member stars (right panel of Table 5). The uncertainty is based on the standard deviation of different stellar estimates.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.