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Table 3.

System parameters of CWBs.

η Carinae ( + ) γ2 Vel ( ⋆ ) HD 93129A (⋄)
Porb (days) 2022.7 ± 1.3 78.53 ± 0.01 yr
T0 2020.11 50120.4 ± 0.4 MJD
e 0.9–0.95 0.334 ± 0.003
ω (°) 240–285 67.4 ± 0.5
i (°) 130–145 65.5 ± 0.4
d (kpc) 2.3 ( * *)

Star A eta Car A WR11 HD 93129Aa
spectral type LBV WC8 O2 If*
M (M) 90 9.0 ± 0.6 60–110
R (R) 60–100 6 ± 3 18.3
L (105L) 50 1.7 25
(10−6 M yr−1) 250–1000 8 ± 4 10
V (km s−1) 500 1550 ± 150 3200

Star B eta Car B HD 93129Ab
Spectral type (WR/O) O7.5 O3.5 V
M (M) 30 28.5 ± 1.1 30–70
R (R) 14.3–23.6 17 ± 2 13.1
L (105L) 10 2.8 55
(10−6 M yr−1) 10–15 0.18 ± 0.04 5.3
V (km s−1) 3000 2500 ± 250 3000

dperiastron (R) 331 172 870
dapastron (R) 3642 344

IRF: South_z40 South_z40 South_z40

Notes. ( * *)The Gaia archive, https://gea.esac.esa.int/archive/

References. ( + )See references in the text. ( ⋆ )Schmutz et al. (1997), De Marco & Schmutz (1999), North et al. (2007). (⋄)del Palacio et al. (2016, 2017); Maíz Apellániz et al. (2017).

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