Table 5.
Binaries in Westerlund 1.
| P | K1 | K2 | γ | e | ω | |||
|---|---|---|---|---|---|---|---|---|
| ID | Spectral type | Type | (days) | (km s−1) | (km s−1) | (km s−1) | (deg) | |
| W2a | B2 Ia | SB1 | 44.95?? | 18.5 | – | −44.6 | ∼0.3? | 285? |
| W6a | B0.5 Iab | SB1/P, X | 2.21? | 25? | – | −38.9 | 0 | – |
| W6b | O9.5 III | SB1 | 2.65?? | 41.6 | – | −64.2 | 0.29? | 249? |
| W10 | B0.5 Ia + O9.5 II | SB2, X | – | 75? | 85? | −34.7? | ≥0.3? | ∼0? |
| W23a | B2 Ia + O9 I | SB1⋆ | 40.46? | 9.2? | – | −52.5 | ∼0.2? | 220? |
| W24 | O9 Iab + O9 I? | SB1⋆, X | 6.60? | 13.6 | – | −50.4 | 0.25? | 212 |
| W30a | O4–6 Ia+ + O | SB1, X | 6.3? | 13? | – | −42.3 | 0 | – |
| W36 (a),(b) | OB + OB | SB2/E, X | 3.18 | 175 | 235 | −37 | 0 | – |
| W43a | B0 Ia | SB1 | 16.23 | 69.4 | – | −64.4 | 0.10 | 149 |
| W52 | B1.5 Ia | SB1/P | 6.62? | 24.7? | – | −48? | 0? | – |
| W53a | O + O | SB2/P, X | 1.3 | 125? | 140? | −40? | 0 | – |
| W71 | B2.5 Ia | SB1 | 36.64?? | 9.8 | – | −44.8 | ∼0.1? | 90? |
| W232 | B0 Iab | SB1 | 9.98 | 14.7? | – | −45.3 | 0.41 | 256? |
| W1021 (a),(b) | O + O | SB2/E | 4.45 | 229 | 187 | −40 | 0.18 | 252 |
| W1022 | O9.5 II | SB1 | 6.18? | 73.2? | – | −36.6? | ≤0.3? | – |
| W1030 | O9.5 Ib | SB1 | 173.85 | 16.5 | – | −46.6 | 0.56 | 323 |
| W1048 | O9.5 Ib | SB1/E? | 8.75 | 76.2 | – | −64.0 | 0.08 | 205 |
| W1050 | O9.5 II | SB1 | 4.06? | 27.6? | – | −51.0 | 0.56? | 161 |
| W1056 | O9.5 II | SB1 | 53.13? | 28.7 | – | −41.8 | 0.31 | 55? |
| W1060 | O9.5 II | SB1 | 3.24 | 28.7? | – | −59.3 | ≤0.1? | – |
| W1063 | O9 III + O? | SB1 | 15.44? | 38.6 | – | −47.8 | 0.32? | 233 |
| W1065 | B0 Ib | SB1 | 11.13 | 52.8 | – | −39.4 | 0.38 | 256 |
| W1067 | B0 Ib | SB1 | 6.13 | 13.2? | – | −46.9 | 0.52? | ∼0? |
| W13 (a),(b),(c) | WNVL + OB | SB2/E, X | 9.27 | 210.2 | 137.3 | −48.2 | 0 | – |
| WR A/W72 (a) | WN7b + O? | P, X | 7.63 | – | – | – | – | – |
| WR B (a),(b) | WN7o + O? | SB1/E, X | 3.52 | – | 360 | −35 | 0 | – |
| WR F/W239 (d) | WC9d + O + ? | SB1 | 5.05 | 39.7 | – | −60.5 | 0 | – |
| WR L/W44 | WN9h + O? | SB1 | 53.95 | 130.8 | – | −36.4 | 0 | – |
Notes. Errors are omitted to save space, but are given in the text or in cited references. Targets that require confirmation of the orbital period are marked with one (candidate) or two (tentative) question marks, while other parameters with errors ≥20% are also highlighted with a question mark. The type column indicates single or double lined systems (SB1/SB2) and Eclipsing or Periodic photometric variables. Strong X-ray sources are also noted (Clark et al. 2019b). An asterisk marks SB1s with anomalous C III λ8500 absorption that implies the presence of a luminous O9 secondary.
References. (a)Bonanos (2007), (b)Koumpia & Bonanos (2012), (c)Ritchie et al. (2010), (d)Clark et al. (2011).
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