Table 4
Estimates of the astrometric and orbital parameters of AB Dor A.
| Parameter | Value | Range explored by the MCMC |
|
|
||
| α0 (h m s) | 5 28 44.79483 ± 0.00025 | −0.01–0.01 |
| δ0 (°′′′) | −65 26 55.91774 ± 0.00214 | −0.15–0.15 |
| μα (s yr-1) | 0.00755 ± 0.00001 | 0.00–0.01 |
| μδ (arcsec yr-1) | 0.14101 ± 0.00006 | 0.135–0.145 |
| π (arcsec) | 0.0664 ± 0.0003 | 0.025–0.075 |
| P (yr) | 11.78 ± 0.10 | 0–30 |
| aA (′′) | 0.0314± 0.0010 | 0.0–0.2 |
| m C / m A | 0.101 ± 0.003 | 0–1 |
| e | 0.59 ± 0.05 | 0–1 |
| i (°) | 65 ± 1 | 0–90 |
| ωA (°) | 114 ± 5 | −180–180 |
| Ω (°) | 132 ± 2 | 0–180 |
| T 0 | 1991.9 ± 0.2 | 1990–2020 |
| mA (M⊙) | 0.89 ± 0.08 | |
| mC (M⊙) | 0.090 ± 0.008 | |
Notes. Orbital parameters correspond to the least-square fit analysis, which are coincident within uncertainties, with those provided by a Bayesian approach based on MCMC. For the latter method, the range of explored parameters is also shown. We notice that we have conservatively increased the uncertainties of each parameter to be the largest one resulting from both approaches. The reference epoch is 2000.0. See Sect. 3.2. for details.
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