Table 3
Stellar and wind parameters derived for the O-type stars in four Cygnus OB associations.
| Source | SpT | T eff |
|
log g | log g true a | R | log(Ṁtheo)b | log c |
f ∞ | v ∞ | β | vsini | v mac | M evol d | M spec e | M dyn f | N/H |
| [kK] | [R⊙] | [km s-1] | [km s-1] | [km s-1] | [M⊙] | [M⊙] | [M⊙] | [× 10-4] | |||||||||
|
|
|||||||||||||||||
| Cyg OB1 | |||||||||||||||||
|
|
|||||||||||||||||
| HD 193443P | O 9III | 31.2 | 5.35 ± 0.13 | 3.65 | 3.66 |
|
~−6.8 | – | – | – | – | 105 | 38 |
|
|
1.0 ± 0.1 | 0.6 ± 0.3 |
| HD 193443S | O 9.5V | 29.7 | 4.76 ± 0.23 | 3.75 | 3.76 |
|
– | – | – | – | – | 100 | 27 |
|
|
0.4 ± 0.1 | 0.6 ± 0.3 |
| HD 193514 | O 7–7.5III(f) | 34.5 | 5.65 ± 0.09 | 3.50 | 3.51 |
|
− 6.5 | − 5.6 | 0.03 | 2190 | 1.5 | 90 | 27 |
|
|
– | 2.0 ± 1.0 |
| HD 193595 | O 7V | 35.5 | 5.11 ± 0.05 | 3.75 | 3.75 |
|
– | − 8.7 | 1.0 | – | – | 50 | 28 |
|
|
– | 3.0 ± 1.5 |
| HD 193682 | O 5III(f) | 39.4 | 5.50 ± 0.09 | 3.75 | 3.77 |
|
− 5.8 | − 5.7 | 0.01 | 2650 | 1.0 | 150 | 73 |
|
|
– | 6.0 ± 3.0 |
| HD 194094 | O 8III | 29.9 | 5.45 ± 0.36 | 3.25 | 3.26 |
|
− 6.7 | − 7.0 | 1.0 | – | – | 65 | 32 |
|
|
– | 1.0 ± 0.5 |
| HD 194280 | O 9.7I | 26.9 | 5.61 ± 0.36 | 3.10 | 3.11 |
|
<−6.5 | – | – | – | – | 92 | 41 |
|
|
– | 0.1 ± 0.1 |
| HD 228841 | O 7 | 34.5 | 5.42 ± 0.37 | 3.50 | 3.62 |
|
~−6.4 | − 7.1 | 1.0 | – | – | 317 | 0 |
|
|
– | 5.4 ± 2.7 |
| HD 228989P | O 8.5V | 29.4 | 4.43 ± 0.14 | 3.50 | 3.56 |
|
– | – | – | – | – | 145 | 3 |
|
|
7.0 ± 0.2 | 1.0 ± 0.5 |
| HD 228989S | O 9.7V | 27.8 | 4.28 ± 0.15 | 3.75 | 3.78 |
|
– | – | – | – | – | 120 | 3 |
|
|
6.1 ± 0.2 | 3.0 ± 1.5 |
| HD 229234 | O 9III + ... | 32.0 | 5.09 ± 0.20 | 3.60 | 3.61 |
|
~−6.8 | − 6.5 | 1.0 | – | – | 85 | 38 |
|
|
– | 0.6 ± 0.3 |
|
|
|||||||||||||||||
| Cyg OB3 | |||||||||||||||||
|
|
|||||||||||||||||
| HD 190864 | O 6.5III(f) | 38.0 | 5.35 ± 0.14 | 3.75 | 3.76 |
|
− 6.3 | − 6.4 | 0.06 | 2250 | 1.0 | 80 | 43 |
|
|
– | 5.0 ± 3.0 |
| HD 227018 | O 6.5 | 37.3 | 5.50 ± 0.18 | 4.00 | 4.00 |
|
− 6.9 | – | 1.0 | – | – | 70 | 35 |
|
|
– | 1.0 ± 0.5 |
| HD 227245 | O 7III | 36.0 | 5.18 ± 0.14 | 3.75 | 3.75 |
|
~−6.4 | − 6.7 | 1.0 | – | – | 65 | 19 |
|
|
– | 3.0 ± 0.5 |
| HD 227757 | O 9V | 32.0 | 4.73 ± 0.13 | 3.75 | 3.75 |
|
– | − 8.2 | 1.0 | – | – | 45 | 3 |
|
|
– | 0.6 ± 0.3 |
|
|
|||||||||||||||||
| Cyg OB8 | |||||||||||||||||
|
|
|||||||||||||||||
| HD 191423 | ON 9IIIn | 30.6 | 5.42 ± 0.28 | 3.50 | 3.67 |
|
~−6.8 | − 6.4 | 0.01 | 600 | 0.9 | 410 | 0 |
|
|
– | 5.4 ± 2.5 |
| HD 191978 | O 8III | 33.2 | 5.35 ± 0.23 | 3.75 | 3.75 |
|
− 6.7 | − 8.7 | 1.0 | 1600 | – | 40 | 32 |
|
|
– | 3.0 ± 1.5 |
| HD 193117 | O 9III | 30.1 | 5.36 ± 0.11 | 3.30 | 3.31 |
|
~−6.8 | − 6.3 | 1.0 | – | – | 80 | 28 |
|
|
– | 0.6 ± 0.3 |
|
|
|||||||||||||||||
| Cyg OB9 | |||||||||||||||||
|
|
|||||||||||||||||
| HD 194334 | O 7–7.5III(f) | 33.9 | 5.19 ± 0.07 | 3.50 | 3.51 |
|
~−6.5 | − 6.2 | 1.0 | – | – | 62 | 32 |
|
|
– | 3.0 ± 1.5 |
| HD 194649P | O 6III(f) | 38.0 | 5.14 ± 0.15 | 3.75 | 3.75 |
|
− 6.1 | – | – | – | – | 60 | 67 |
|
|
4.9 ± 0.4 | 3.0 ± 1.3 |
| HD 194649S | O 8V | 33.0 | 4.36 ± 0.27 | 3.75 | 3.76 |
|
– | – | – | – | – | 60 | 27 |
|
|
1.9 ± 0.1 | 1.0 ± 0.5 |
| HD 195213 | O 7III(f) | 35.3 | 5.19 ± 0.22 | 3.50 | 3.51 |
|
~−6.4 | − 6.0 | 1.0 | – | – | 85 | 28 |
|
|
– | 6.0 ± 3.0 |
Notes.
gtrue: gravity corrected from the contribution of the centrifugal force i.e. gtrue = g + (vsini)2/R;
log(Ṁtheo): theoretical mass-loss rate estimated by Muijres et al. (2012) for a given spectral classification;
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