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Table 1

Fit results.

Parameter Best-fit value ± error

Brγ rotation curve modeling1 Brγ spectroastrometric modeling
Fit-R 0 Fit-R 1 Fit-S 0 Fit-S 1

θLON       [°]  215.0 ± 0.5 2172 217 [±4] 3 217 [±4] 3
xc       [″]  −0.013 ± 0.02 0.042 0.04 ± 0.04 0.04 ± 0.03
yc       [″]  0.067 ± 0.02 0.082 0.08 ± 0.034 0.08 ± 0.024
log 10(MUDM/M) 7.22 ± 0.05 7.19 6.93 ± 0.07 6.88 ± 0.07
log 10(M/L) −0.74 ± 0.01 −0.737 −11.2 ± 0.05 −0.742
i       [°]  61 [±1] 3 61 [±1] 3 61 [±1] 3 61 [±1] 3
Vsys       [km   s-1 389.3 ± 0.8 393.6 391 ± 16 390 ± 9
1.80    (309/172) 3.69    (645.4/175) 0.25    (0.76/3) 0.3    (1.4/4)

Notes. 

(1)

The best-fit parameter confidence intervals are computed only for the interesting parameters as explained in the text (see also Avni 1976).

(2)

Parameter held fixed.

(3)

Parameter held fixed. The adopted value (with corresponding errors) was estimated independently from the fit presented in the table.

(4)

Derived from xc using the adopted value of θLON.

(5)

Parameter not constrained from the fit.

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