Table 5
Comparison of atmospheric parameters and element abundances using different methods to estimate the effective temperature.
| Star | vsini | Method of | Method | Teff | log g | ξ | Si | Mg | N | Δ[Disc] | |
| (km s-1) | Analysis | Constraints | (K) | (km s-1) | % | ||||||
|
|
|||||||||||
| NGC 346-004 | 266 | He ii | Primary | 24 000 | 2.90 | 10 | 6.8 | 6.8 | 7.8 | 0 | |
| NGC 346-004 | 266 | Si | Fixed | 23 500 | ... | ... | 6.7 | 6.8 | 7.7 | ... | |
| NGC 346-004 | 266 | Si | Free | 23 400 | 2.90 | 10 | 6.7 | 6.8 | 7.7 | 0 | |
| NGC 346-004 | 266 | Si/Mg | Fixed | 25 000 | ... | ... | 6.9 | 6.9 | 8.0 | ... | |
| NGC 346-004 | 266 | Si/Mg | Free | 22 400 | 2.80 | 11 | 6.7 | 6.7 | 7.6 | 0 | |
| NGC 346-009 | 181 | He ii | Primary | 29 500 | 3.40 | 10* | 6.9 | 6.5 | 7.6 | 0 | |
| NGC 346-009 | 181 | Si | Fixed | 28 900 | ... | ... | 6.8 | 6.5 | 7.5 | ... | |
| NGC 346-009 | 181 | Si | Free | 28 800 | 3.40 | 10* | 6.8 | 6.5 | 7.5 | 0 | |
| NGC 346-023 | 50 | He ii | Primary | 31000 | 3.65 | 10* | 6.8 | ... | 7.6 | 0 | |
| NGC 346-023 | 50 | Si | Fixed | 27 400 | ... | ... | 6.2 | ... | 6.9 | ... | |
| NGC 346-023 | 50 | Si | Free | 29 200 | 4.00 | 5* | 6.9 | ... | 7.3 | 35 | |
| NGC 346-024 | 190 | Si | Primary | 16 500 | 2.50 | 20* | 6.7 | 6.5 | 7.3 | 0 | |
| NGC 346-024 | 190 | Si/Mg | Fixed | 16 800 | ... | ... | 6.6 | 6.6 | 7.3 | ... | |
| NGC 346-024 | 190 | Si/Mg | Free | 21 000 | 3.20 | 10* | 6.7 | 6.7 | 7.5 | 40 | |
| NGC 330-029 | 209 | He ii | Primary | 31000 | 4.40 | 1 | 6.8 | ... | 7.8 | 25 | |
| NGC 330-029 | 209 | Si | Fixed | 30 700 | ... | ... | 6.8 | ... | 7.7 | ... | |
| NGC 330-029 | 209 | Si | Free | 30 700 | 4.40 | 1 | 6.8 | ... | 7.7 | 25 | |
| NGC 330-031 | 178 | He ii | Primary | 28 000 | 3.50 | 17 | 6.8 | ... | 7.3 | 35 | |
| NGC 330-031 | 178 | Si | Fixed | 25 900 | ... | ... | 6.6 | ... | 7.1 | ... | |
| NGC 330-031 | 178 | Si | Free | 26 100 | 3.65 | 23 | 6.7 | ... | 7.2 | 50 | |
| N 11-074 | 102 | He ii | Primary | 27 500 | 3.65 | 10* | 7.2 | ... | 7.2 | 40 | |
| N 11-074 | 102 | Si | Fixed | 26800 | ... | ... | 7.2 | ... | 7.2 | ... | |
| N 11-074 | 102 | Si | Free | 25 100 | 3.40 | 10* | 7.2 | ... | 7.1 | 50 | |
Notes. The method used is indicated as follows: He ii: profile fitting of the He ii absorption line at 4686 Å; Si: silicon ionization equilibrium, requiring at least 2 ionisation stages of Si; Si/Mg: uses the relative abundance estimates of silicon and magnesium see Sect. 3.3.1 for more details. The estimated percentage contribution of disc emission (Δ[Disc]) to the continuum is also listed. The parameters from the primary methodology are listed first together with those from other effective temperature estimators, quoted as either “Fixed” or “Free”. “Fixed” parameters are where other atmospheric parameters (log g and ξ) and estimates of the disc contamination are taken from the primary method, whereas “Free” parameters allow all the parameters to change.
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