Table 5.
Spectral type, radial velocity, membership probability, and the distance based on Gaia EDR3 Gaia Collaboration (2020), for members of NGC 6231 and HD153919/4U1700-37.
| Name | Spectral type | vrad (km s−1) | Error (km s−1) | pMember | Distance (kpc) |
|---|---|---|---|---|---|
| HD 326331 | O8 IVn((f)) | −32.7[1] | 9 | 92% |
 |
| HD 152248 | O7 Iabf + O7 Ib(f) | −42.3[2] | 1.3 | 73% |
 |
| HD 152219 | O9.5 III(n) | −34.3[3] | 1.5 | 91% |
 |
| HD 152270 | WC7 + O5-8 | −44.0[4] | 2 | 69% |
 |
| HD 326329 | O9.7 V | −26.4[1] | 2.7 | 83% |
 |
| CPD-41 7721 | O9.5 V | −25.5[1] | 9.8 | 62% |
 |
| HD 152314 | O9 IV | −28.5[1] | 7.8 | 75% |
 |
| HD 153919 | O6.5 Iaf+ | −64.5[5] | 1.5 |
 |
|
Notes. The mean radial velocity of the cluster members is −33.4 ± 4.0 km s−1.
References. [1] Sana et al. (2009), [2] Pourbaix et al. (2005), [3] Hill et al. (1974), [4] Wilson (1983), [5] Gies & Bolton (1986).
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