Table B.2.
Overview for all the observed stars.
| Object | Component | Sep (AU) | Period | Spec. type | mK | Mass (M⊙) | Limit (M⊙) | Reference |
|---|---|---|---|---|---|---|---|---|
| θ1 Ori A | A1 | B0.5V | 5.67 | 14 ± 5 | (1, 2, 3) | |||
| A2 | 90–100 | 214 yr | F PMS | 7.3 ± 0.3 | 4 | (This work, 4, 5, 6, 10, 26) | ||
| A3 | 0.71 | 65.09 ± 0.07 d | T Tauri | 2.6 ± 0.1 | (7, 8, 9, 11, 12, 13) | |||
| θ1 Ori B | B1 | B1V | 6.00 | 7.2 ± 0.2 | < 1.9 | (This work, 2, 16, 22, 33) | ||
| B2 | 382 ± 6 | 1920 yr | 7.6 | 4 | (4, 5, 10, 26) | |||
| B3 | 49 ± 1 | 200 yr | 8.6 | 3 | (4, 5, 10, 26) | |||
| B4 | 248 ± 4 | 2000 ± 700 yr | 11.66 | 1 | (15, 26, 32, 42) | |||
| B5 | 0.120 ± 0.002 | 6.47 d | 2 | (13, 14, 26) | ||||
| B6 | 3.5-7.2 | B | 7.3 ± 0.5 | 4–6 | (This work, 19) | |||
| θ1 Ori C | C1 | O7V | 4.57 | 33.5 ± 5.2 | < 3 | (This work, 17, 18, 20, 21, 45) | ||
| C2 | 18.1 ± 1.7 | 11.4 yr | O9.5 | 6.0 ± 0.4 | 12 ± 3 | (This work, 5, 7, 20, 21, 22, 23) | ||
| C3. | 0.41 ± 0.01 | 61.49 d | 1.0 ± 0.2 | (23, 24) | ||||
| θ1 Ori D | D1 | B1.5V | 5.75 | 16 ± 1 | < 2.8 | (2, 3, 27) | ||
| D2 | 580 ± 10 | 11.69 ± 0.06 | 1 ± 0.1 | (This work, 26) | ||||
| D3 | 0.77 ± 0.03 | 53.03 ± 0.07 d | B | 6.9 ± 0.3 | 6 ± 1 | (This work, 6, 25, 43) | ||
| θ1 Ori E | E1 | G2IV | 6.9 | 2.81 ± 0.05 | < 1.8 | (28, 29, 30, 31) | ||
| E2 | 0.091 ± 0.001 | 9.8952 ± 0.0007 d | G0IV–G5III | 2.80 ± 0.05 | (28, 30, 31) | |||
| θ2 Ori A | A1 | O9.5IV | 4.94 | 39 ± 14 | < 1.6 | (3, 17, 18) | ||
| A2 | 0.42 ± 0.01 | 20.974 ± 0.003 d | 5.7 ± 0.2 | 10 ± 2 | (This work, 13) | |||
| A3 | 157 | 6–13 | (16, 32) | |||||
| θ2 Ori B | B1 | B2–B5 | 6.41 | 14.8 ± 3.4 | < 1.9 | (3, 18, 33, 34) | ||
| B2 | 40 ± 1 | A–F | 10.6 ± 1.3 | 1.6 ± 0.7 | (This work) | |||
| θ2 Ori C | C1 | B5V | 7.54 | 4 ± 1 | (2, 39) | |||
| C2 | 0.165 ± 0.003 | 13 d | (35) | |||||
| C3 | 15.7 ± 0.2 | A | 9.89 ± 0.07 | 1.7 ± 0.2 | (This work) | |||
| NU Ori | NU Ori1 | O9V | 5.49 | 16 ± 3 | < 2 | (2, 6, 33, 37) | ||
| NU Ori2 | 0.36 ± 0.01 | 19.1387 ± 0.0028 d | > 2.5 | (This work, 13) | ||||
| NU Ori3 | 195 ± 4 | A or B | 8.7 ± 0.1 | 2.4 ± 0.6 | (This work, 32, 36) | |||
| NU Ori4 | 3.6 ± 0.1 | B | 7.3 ± 0.1 | 4 ± 1 | (This work) | |||
| HD 37115 | HD 371151 | B5 | 7.13 | 5.4 ± 0.4 | < 2.2 | (This work, 2, 32, 40) | ||
| HD 371152 | 368 ± 6 | 1.6 ± 0.1 | (32) | |||||
| TCC 59 | TCC 591 | YSO | 11.05 | ≥1.5 | (This work, 29) | |||
| TCC 592 | 56 ± 2 | (26) | ||||||
| Brun 862 | K3–M0I | 4.49 | 13 | < 2.2 | (This work, 2, 33) | |||
| θ1 Ori F | B8 | 8.38 | 2.2–2.8 | < 1.5 | (This work, 29, 38) | |||
| TCC 43 | A–F | 10.44 | > 1.5–1.7 | < 1.1 | (This work, 29) | |||
| LP Ori | B1.5V | 7.47 |  |
< 1.9 | (This work, 2, 33, 39, 44) | |||
| HD 37150 | B3III/IV | 7.11 | ≥7 | < 1.9 | (This work, 2, 41) |
Notes. From left to right starting with the object, its component, the separation or, if known, the semi-major axis, the period, spectral type, magnitude in K-band, mass of component, detection limit and the reference. Objects in bold have been observed with GRAVITY. The uncertainties for the mass are taken from the literature. Values without uncertainties are not necessarily exact but were published without an error estimate.References: (1) Levato & Abt (1976), (2) Cutri et al. (2003), (3) Simón-Díaz et al. (2006), (4) Petr et al. (1998), (5) Schertl et al. (2003), (6) Grellmann et al. (2013), (7) Mattei & Baldwin (1976), (8) Lohsen (1975), (9) Bossi et al. (1989), (10) Close et al. (2003), (11) Vitrichenko et al. (1998), (12) Vitrichenko & Plachinda (2001), (13) Abt et al. (1991), (14) Popper & Plavec (1976), (15) Simon et al. (1999), (16) Mason et al. (1998), (17) Sota et al. (2011), (18) Ducati (2002), (19) Vasileiskii & Vitrichenko (2000), (20) Kraus et al. (2007), (21) Kraus et al. (2009), (22) Weigelt et al. (1999), (23) Lehmann et al. (2010), (24) Vitrichenko (2002b), (25) Vitrichenko (2002a), (26) Close et al. (2012), (27) Levenhagen & Leister (2006), (28) Herbig & Griffin (2006), (29) Muench et al. (2002), (30) Morales-Calderón et al. (2012), (31) Costero et al. (2008), (32) Preibisch et al. (1999), (33) Hillenbrand (1997), (34) Nieva & Przybilla (2014), (35) Corporon & Lagrange (1999), (36) Köhler et al. (2006), (37) Bragança et al. (2012), (38) Herbig (1950), (39) Samus’ et al. (2017), (40) Röser et al. (1994), (41) Houk & Swift (1999), (42) Close et al. (2013), (43) Allen et al. (2017), (44) Reiter et al. (2018), (45) Balega et al. (2015).
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