Table 2.
Best-fit orbital elements and parameters for our binary systems.
| Parameter | AI Phe | AL Dor | KW Hya | NN Del | ψ Cen | V4090 Sgr |
|---|---|---|---|---|---|---|
| Porb (days) | 24.59215(2) | 14.90537(1) | 7.750468(6) | 99.2690(9) | 38.8121(2) | 11.41497(2) |
| Tp (days) | 8248.603(4) | 7764.791(2) | 24.421(32) | 5235.164(70) | 8180.836(17) | 2442657.8(5) |
| e | 0.1872(1) | 0.1952(1) | 0.094(4) | 0.5197(4) | 0.550(1) | 0.012(6) |
| K1 (km s−1 ) | 51.166(8) | 57.367(8) | 70.14(18) | 36.191(23) | 49.51(16) | 47.7(2) |
| K2 (km s−1 ) | 49.118(7) | 57.420(9) | 93.20(62) | 39.407(37) | 80.48(33) | 92(1) |
| γ (km s−1 ) | −2.111(4) | 11.805(4) | −4.31(17)/−1.87(68) (b) | −9.485(15) | 3.58(9) | −36.3(1) |
| ω (°) | 110.36(3) | 287.48(3) | 225.38(1.6) | 350.00(7) | 19.45(27) | 57(17) |
| Ω (°) | 13.31(23) | 223.83(7) | 75.76(11) | 181.41(14) | 115.79(10) | 29.0(3) |
| a (mas) | 1.315(5) | 2.344(9) | 1.329(7) | 3.508(13) | 5.055(20) | 1.596(11) |
| a (AU) | 0.2227(8) | 0.1543(5) | 0.1160(6) | 0.5894(21) | 0.3874(17) | 0.1471(14) |
| i (°) | 91.32(39) | 91.21(11) | 92.50(26) | 89.90(11) | 89.20(13) | 87.4(6) |
| M1 (M⊙) | 1.1941(7) | 1.1029(4) | 1.975(28) | 1.4445(29) | 3.187(31) | 2.15(7) |
| M2 (M⊙) | 1.2438(7) | 1.1018(5) | 1.487(13) | 1.3266(21) | 1.961(15) | 1.11(2) |
| d (pc) | 169.35(69) | 65.81(24) | 87.25(57) | 167.99(65) | 76.64(37) | 92.21(71) (a) |
| π (mas) | 5.905(24) | 15.200(56) | 11.462(74) | 5.953(23) | 13.049(63) | 10.845(83) (a) |
Notes. Values in parentheses are uncertainties on the final digits. Porb: orbital period. Tp: time passage through periastron (−2 445 000). e: eccentricity. K1, K2: radial velocity semi-amplitude of the primary and secondary. γ: systemic velocity. ω: argument of periastron. Ω: position angle of the ascending node. a: semi-major axis. i: orbital inclination. M1, M2: mass of primary and secondary. d, π: distance and parallax.
These two values correspond to a difference in systemic velocity, respectively for the primary and secondary (see Sect. 5.3).
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