Table 3.
Orbital parameters of LMC WN binaries with constrained orbits.
| BAT | Spectral type (a) | P | T0 | V0 | e | ω | KWR | K2 |  |
MWR sin 3i | M2 sin 3i | i | M2 | MWR | aWR | a2 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| [d] | [MJD] | [km s−1] | [°] | [km s−1] | [km s−1] | [M⊙] | [M⊙] | [M⊙] | [°] | [M⊙] | [M⊙] | [R⊙] | [R⊙] | ||||
| SB2 solutions with constrained inclinations | |||||||||||||||||
| 019 (b) | WN4 + O6 V | 17.998(1) | 51914.4 ± 0.2 | 258 ± 7 | 0 (fixed) | 194 ± 5 | 206 ± 4 | 115 ± 5 | 1.79 ± 0.05 | 22.1 ± 2.6 | 39.6 ± 4.4 | 86 |
→ | 40 |
22 |
74 |
41 |
| 119 (c) | WN6h + | 158.76(2) | 56022.6 ± 0.2 | 270 ± 5 | 0.788 ± 0.007 | 61 ± 7 | 96 ± 3 | 95 ± 4 | 1.01 ± 0.05 | 13.3 ± 1.1 | 13.4 ± 1.1 | 39 |
→ | 54 |
53 |
295 |
292 |
| O3.5 If*/WN7 | |||||||||||||||||
| 129 (d) | WN3(h) + O5 V | 2.7689(2) | 51945.927 ± 0.005 | 265 ± 5 | 0 (fixed) | n/a | 316 ± 5 | 193 ± 6 | 1.64 ± 0.03 | 14.3 ± 1.5 | 23.5 ± 2.4 | 73 |
→ | 27 |
16 |
18 |
11 |
| SB2 solutions without constrained inclinations (M2 adopted from BONNSAI evolution models) | |||||||||||||||||
| 049 (e) | WN3 + O8 V | 31.69(3) | 51943.0 ± 0.9 | 234 ± 17 | 0.35 ± 0.11 | 21 ± 16 | 104 ± 13 | 52 ± 11 | 2.0 ± 0.25 | 3.4 ± 1.5 | 6.8 ± 2.8 | 42 |
← | 23 |
11 |
92 |
46 |
| 077 (b),(f) | WN7 + O7.5 III | 3.003(3) | 52631.9 ± 0.1 | 333 ± 8 | 0.32 ± 0.02 | 7 ± 4 | 292 ± 30 | 176 ± 30 | 1.66 ± 0.2 | 10.2 ± 3.4 | 16.9 ± 5.1 | 51 |
← | 36 |
22 |
21 |
13 |
| 103 (b) | WN5 + O4 V | 2.7586(4) | 53007.9 ± 0.1 | 220 ± 10 | 0 (fixed) | n/a | 266 ± 8 | 137 ± 24 | 1.94 ± 0.18 | 6.4 ± 2.0 | 12.3 ± 3.3 | 39 |
← | 51 |
26 |
23 |
12 |
| 107 (b) | O6.5 Iafc + O6.5 Iaf | 153.89(6) | 56041.5 ± 0.4 | 262 ± 1 | 0.49 ± 0.01 | 130 ± 2 | 95 ± 1 | 118 ± 2 | 0.81 ± 0.02 | 56.5 ± 2.1 | 45.5 ± 1.6 | 74 |
← | 51 |
63 |
262 |
326 |
| 113 (b) | O2 If*/WN5 + B0 V | 4.6965(2) | 52993.5 ± 0.4 | 269 ± 8 | 0 (fixed) | n/a | 100 ± 2 | 310 ± 11 | 0.32 ± 0.04 | 25.3 ± 2.8 | 8.2 ± 0.9 | 52 |
← | 17 |
53 |
12 |
37 |
| 116 (i) | WN5h + WN5h | 154.55(5) | 57671.2 ± 0.9 | 287 ± 5 | 0.68 ± 0.02 | 20.9 ± 3.8 | 130 ± 7 | 141 ± 6 | 0.92 ± 0.07 | 65.3 ± 7.3 | 60.2 ± 7.0 | 51 |
← | 127 |
139 |
374 |
406 |
| WR + WR SB2 solutions without constrained inclinations (i fixed to 57°) | |||||||||||||||||
| 032 (b),(e) | WN5(h) + WN6(h): | 1.90756(1) | 53011.6 ± 0.1 | 288 ± 6 | 0.06 ± 0.02 | 250 ± 22 | 120 ± 3 | 123 ± 23 | 0.98 ± 0.19 | 1.4 ± 0.5 | 1.4 ± 0.4 | 57 | 2 | 2 | 5 | 6 | |
| +abs | |||||||||||||||||
| 095 (b) | WN5 + WN7 | 2.111(2) | 52999.8 ± 0.1 | 274 ± 9 | 0 (fixed) | n/a | 356 ± 14 | 162 ± 20 | 2.2 ± 0.13 | 9.5 ± 2.3 | 20.9 ± 4.3 | 57 | 35 | 16 | 18 | 8 | |
| SB1 solutions with constrained inclinations (M2 adopted from BONNSAI evolution models if possible) | |||||||||||||||||
| 006 (g) | O3 If*/WN7 + OB | 2.001185(5) | 46505.84 ± 0.01 | 278 ± 6 | 0 (fixed) | n/a | 320 ± 7 | – | – | – | – | – | – | – | – | – | |
| +(O7 V: + ?) | |||||||||||||||||
| 043 (e) | WN3 + O9 V | 2.816(2) | 51932.6 ± 0.3 | 287 ± 9 | 0.07 ± 0.05 | 211 ± 43 | 244 ± 14 | – | – | – | – | 68 |
17 |
14 |
15 |
12 |
|
| 064 (e) | WN3 + O9 V | 37.59(6) | 51920.5 ± 2.6 | 235 ± 21 | 0.16 ± 0.09 | 29 ± 26 | 57 ± 5 | – | – | – | – | 80 |
17 |
65 |
43 |
163 |
|
| 071 (e),(j) | WN3 + O6.5 V | 5.2081(5) | 52314.5 ± 0.2 | 329 ± 17 | 0.09 ± 0.08 | 265 ± 41 | 227 ± 40 | – | – | – | – | 72 |
28 |
27 |
24 |
24 |
|
| SB1 solutions without constrained inclinations (masses unconstrained) | |||||||||||||||||
| 012 (f) | O3 If*/WN6 | 3.2358(5) | 52269.8 ± 0.1 | 431 ± 8 | 0.35 ± 0.06 | −29 ± 11 | (74 ± 5) (l) | – | – | – | – | – | – | – | – | – | |
| 029 (e) | WN3 + B1.5 V | 2.2016(3) | 51552.0 ± 0.3 | 351 ± 9 | 0.16 ± 0.13 | −7 ± 46 | 59 ± 8 | – | – | – | – | – | – | – | – | – | |
| 059 (e) | WN3 + O6 III | 4.7129(7) | 51954.6 ± 0.2 | 367 ± 28 | 0.32 ± 0.08 | 329 ± 19 | 30 ± 3 | – | – | – | – | – | – | – | – | – | |
| 092 (f) | WN3 + O6 V | 4.3125(6) | 53000.0 ± 0.1 | 332 ± 7 | 0 (fixed) | n/a | 204 ± 5 | – | – | – | – | – | – | – | – | – | |
| + B1 Ia | |||||||||||||||||
| 099 (f) | O2.5 If*/WN6 | 92.6(3) | 53045.4 ± 1.3 | 337 ± 16 | 0 (fixed) | n/a | 91 ± 19 | – | – | – | – | – | – | – | – | – | |
| 112 (h) | WN5h | 8.2(1) | – | 389 ± 21 | 0 (fixed) | n/a | 42 ± 20 | – | – | – | – | – | – | – | – | – | |
| 126 (d),(k) | WN3 + O7 V+OB | 25.5(4) | 51114 ± 2 | 317 ± 38 | 0.38 ± 0.06 | 343 ± 15 | 27 ± 2 | – | – | – | – | – | – | – | – | – | |
Notes. (j)Alternative solution found for P = 2.3264 d – given solution based on photometric period. (k)Photometric period is 1.55296 ± 1 × 10−5 d. (l)Derived by S08, but cannot be confirmed in this work: RVs constant within 2σ ≈ 10 km s−1.
References.(a)For spectral type references, see Table 1. (b)This study. (c)Shenar et al. (2017). (d)Foellmi et al. (2006). (e)FMG03. (f)S08. (g)Niemela et al. (2001), Koenigsberger et al. (2003). (h)Schnurr et al. (2009). (i)Adopted from Tehrani et al. (2019).
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