Robotic observations of the most eccentric spectroscopic binary in the sky

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Volume 559 (November 2013)

A&A, 559 (2013) A17

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Table 2

Spectroscopic orbital elements for Gl586A.

Parameter	This paper	Monte-Carlo	Duquennoy et al. (1992)
	w/ rms error	error


P (days)	889.81948 ± 0.00028^a	assumed	889.62 ± 0.12
T_Periastron (HJD)	2 454 196.2885 ± 0.00033	0.0019	2 447 967.5420 ± 0.0031
γ (km s^-1)	7.5047 ± 0.0015	0.0039	7.323 ± 0.04^b
e	0.976081 ± 0.000012	0.00004	0.9752 ± 0.0003
K_Aa (km s^-1)	37.844 ± 0.0058	0.028	37.14 ± 0.12
K_Ab (km s^-1)	56.597 ± 0.031	0.034	55.50 ± 0.43
ω (deg)	255.690 ± 0.0098	0.032	253.9 ± 0.3
a_Aa sin i (10⁶ km)	100.67 ± 0.029	0.11	100.95 ± 0.34
a_Ab sin i (10⁶ km)	150.56 ± 0.090	0.15	150.87 ± 1.20
M_Aa sin³i (M_⊙)	0.4782 ± 0.00068	0.0013	0.480 ± 0.030
M_Ab sin³i (M_⊙)	0.3197 ± 0.00033	0.00089	0.322 ± 0.018
mass ratio, q ≡ M_Ab/M_Aa	0.6696 ± 0.0007	...	0.670 ± 0.009
N_Aa, N_Ab	598, 598	...	97, 10
rms_Aa (m s^-1)	41	...	300
rms_Ab (m s^-1)	258	...	2020

Notes.

^(a)

From the combined-data SB1 solution as described in the text;

^(b)

converted to the STELLA zero point for easier comparison; N is the number of radial-velocity measurements used in the orbit computation.

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