Orbital parameters of BD +60 73.
|P (d)||15.6627 ± 0.0042 a|
|T0 (HJD-2 450 000)||3000.04 ± 0.34|
|ω (deg)||167 ± 6|
|K1 (km s-1)||19 ± 2|
|γ1 (km s-1)||− 79 ± 12|
|γ2 (km s-1)||− 81 ± 3|
|γ3 (km s-1)||− 77 ± 2|
|γ4 (km s-1)||− 68.7 ± 0.5|
|f(m) (M⊙)||0.009 ± 0.002|
|a1sini (km)||3.8 ± 0.3 × 106|
|σ (km s-1)||4.49|
Notes. Included are the period (P), the time of periastron (T0), the eccentricity (e), the angle of the line of nodes (ω), the velocity semi-amplitude (K1), the centre-of-mass velocity for the different instrument configurations (γ1 = DDO 1800G, γ2 = DDO 600C, γ3 = DDO He i, γ4 = KPNO He i), the mass-function (f(M)), the projected semi-major axis (a1sini), and the standard error of the fit (σ). γ2 is adopted as the centre-of-mass velocity, as discussed in the text.
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