Table 1.
Sample of Galactic O-type stellar groups in this paper.
| ID | Other ID(s) | O- and WR-type stars | Spectral type | Ref. |
|---|---|---|---|---|
| O-001 | NGC 3603 | NGC 3603 HST-A1 | WN6ha | C98 |
| RCW 57 | NGC 3603 HST-B | WN6ha | C98 | |
| NGC 3603 HST-C | WN6ha | C98 | ||
| NGC 3603 MTT 58 | O2 If*/WN6 + O3 If | R13b | ||
| NGC 3603 MTT 31 | O2 V | R16 | ||
| NGC 3603 HST-48 | O3.5 If* | M16 | ||
| Many others | D95,W02,M08,R12,R13a,R16 | |||
| O-002 | Trumpler 14 | HD 93 129 Aa,Ab | O2 If* + O2 If* + OB? | M17 |
| HD 93 129 B | O3.5 V((f))z | M16 | ||
| HD 93 128 | O3.5 V((fc))z | S14 | ||
| Many others | S14,M16 | |||
| O-003 | Trumpler 16 W | HD 93 162 | O2.5 If*/WN6 + OB | S14 |
| ALS 15 210 | O3.5 If* Nwk | S14 | ||
| HD 93 205 | O3.5 V((f)) + O8 V | S14,TW | ||
| HD 93 204 | O5.5 V((f)) | S14 | ||
| O-004 | Westerlund 2 | V712 Car | O3 If*/WN6 | TW |
| RCW 49 | WR 20b | WN6ha | R11 | |
| Westerlund 2-199 | O3 V | N08 | ||
| Many others | N08,R11,V13 | |||
| O-005 | Pismis 24 | Pismis 24-1 A,B | O3.5 If* | S14 |
| NGC 6357 W | Pismis 24-17 | O3.5 III(f*) | S14 | |
| RCW 131 W | WR 93 | WC7 + O7/9 | V01 | |
| Several others | S14,M16 | |||
| O-006 | Gum 35 | THA 35-II-153 | O3.5 If*/WN7 | M16 |
| Majaess 133 | ALS 2063 | O5 Ifp | S14 | |
| ALS 18 551 | O4.5 V(n)z + O4.5 V(n)z | M16 | ||
| Several others | S14,M16 | |||
| O-007 | Cyg OB2-22 cluster | Cyg OB2-22 A | O3 If* | S11 |
| Bica 1 | Cyg OB2-9 | O4 If + O5.5 III(f) | M19 | |
| Cyg OB2-22 B | O6 V((f)) | S14 | ||
| Several others | S11,S14 | |||
| O-008 | Cyg OB2-8 cluster | Cyg OB2-7 | O3 If* | S11 |
| Bica 2 | Cyg OB2-8 C | O4.5 (fc)p var | S14 | |
| Cyg OB2-8 A | O6 Ib(fc) + O4.5 III(fc) | M19 | ||
| Several others | S11,S14,M91 | |||
| O-009 | M 17 | ALS 19 613 A | O2/4 V | TW |
| Omega nebula | ALS 19 618 A | O4 V(n)((fc)) | M16 | |
| NGC 6618 | ALS 19 617 | O5 V | H08 | |
| Sh 2-45 | Several others | C78,H08 | ||
| RCW 160 | ||||
| O-010 | NGC 6193 | HD 150 136 Aa,Ab | O3.5–4 III(f*) + O6 IV | S14 |
| RCW 108 | HD 150 135 Aa,Ab | O6.5 V((f))z | S14 | |
| O-011 | Berkeley 90 | LS III +46 11 | O3.5 If* + O3.5 If* | M16 |
| Sh 2-115 | LS III +46 12 | O4.5 IV(f) | M16 | |
| O-012 | NGC 2467 | CPD −26 2704 | O7 V(n) | M16 |
| Sh 2-311 | ( † ) HD 64 568 | O3 V((f*))z | S14 | |
| RCW 16 | ( † ) HD 64 315 A,B | O5.5 V + O7 V | M16 | |
| O-012 N | Haffner 19 | – | ||
| O-012 S | Haffner 18 | CPD −26 2704 | O7 V(n) | M16 |
| O-013 | Sh 2-158 | Sh 2-158 1 | O3.5 V((f*)) + O9.5: V | M16 |
| NGC 7358 | Sh 2-158 2 | O9.5: V + B0.5: V | M16 | |
| O-014 | North America nebula | Bajamar star | O3.5 III(f*) + O8: | M16 |
| NGC 7000 | ( † †) HD 199 579 | O6.5 V((f))z | S11 | |
| Sh 2-117 | ||||
| O-015 | Collinder 419 | HD 193 322 Aa,Ab | O9 Vnn + O8.5 III + B2.5: V: | T11 |
| O-016 | NGC 2264 | 15 Mon Aa,Ab | O7 V((f))z + B1: Vn | M20 |
| Sh 2-273 | ||||
| O-016 N | NGC 2264 N | 15 Mon Aa,Ab | O7 V((f))z + B1: Vn | M20 |
| O-016 S | NGC 2264 S | – |
Notes. The other IDs may refer to the cluster or the associated H II region. ( † )Outside region, possible runaway. ( † †)In nebula but chance alignment.
References. C78: Crampton et al. (1978), C98: Crowther & Dessart (1998), D95: Drissen et al. (1995), H08: Hoffmeister et al. (2008), M91: Massey & Thompson (1991), M08: Melena et al. (2008), M16: Maíz Apellániz et al. (2016), M17: Maíz Apellániz et al. (2017), M19: Maíz Apellániz et al. (2019a), M20: Maíz Apellániz & Barbá (2020), N08: Nazé et al. (2008), R11: Rauw et al. (2011), R12: Roman-Lopes (2012), R13a: Roman-Lopes (2013a), R13b: Roman-Lopes (2013b), R16: Roman-Lopes et al. (2016), S11: Sota et al. (2011), S14: Sota et al. (2014), T11: ten Brummelaar et al. (2011), TW: This work, V01: van der Hucht (2001), V13: Vargas Álvarez et al. (2013), W02: Walborn et al. (2002b).
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