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Home All issues Volume 497 / No 1 (April I 2009) A&A, 497 1 (2009) 195-207 Full HTML
   

Table 4:

Orbital elements as determined with the algorithm from Docobo (1985) and our grid search algorithm (described in Sect. 5.1).
    Docobo Grid search
Parameter   algorithm algorithm
P [yrs] $11.05 \pm 0.03$ $11.26 \pm 0.5$
T0   $2002.87 \pm 0.40$ $2002.57 \pm 0.5$
e   $0.534 \pm 0.050$ $0.592 \pm 0.07$
a [mas] $40.00 \pm 3.00$ $43.61 \pm 3$
i [$^\circ $] $100.7 \pm 1.0$ $99.0 \pm 2.6$
$\Omega$ [$^\circ $] $25.3 \pm 1.5$ $26.5 \pm 1.7$
$\omega$ [$^\circ $] $290.9 \pm 2.5$ $285.8 \pm 8.5$
$\chi^2_r$   1.84 0.56
a3/P2 [mas3/yrs2] $524 \pm 130$ $645 \pm 200$
$M_{\rm C1}/M_{\rm C2}$   $0.21 \pm 0.05$ $0.23 \pm 0.05$
$M_{\rm C1}+M_{\rm C2}$ [$M_{\odot }$] $49 \pm 4$ $47 \pm 4$
$d_{\rm dyn}$ [pc] $456 \pm 13$ $416 \pm 12$
Notes. Besides the orbital elements, we give the mass ratio (Sect. 5.2), dynamical distance, and system mass (Sect. 5.3), derived from both set of orbit elements. The dynamical distance and system mass was determined using the method from Baize & Romani (1946, method <)650#>c in Sect. 5.3# and three different MLRs. When assuming another distance  $d^{\prime}$, the dynamical system mass $M_{\rm C1}+M_{\rm C2}$ must be scaled by a factor $(d^{\prime}/d_{\rm dyn})^3$. The mass ratio $M_{\rm C1}/M_{\rm C2}$ was also computed for the distance $d_{\rm dyn}$, but can be converted to any other distance using Eq. (5).

Source LaTeX | All tables | In the text

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