Fig. 6
The motion of component TWA 5B relative to Aa. Note that this is a combination of the orbit of B and the orbit of Aa, which are both around the CM of Aa/Ab. The error bars are the measurements, the solid line is the best fit with the mass ratio Ab/Aa as a free parameter. The dotted line shows the best-fitting orbit if the mass ratio is fixed at 1 or for equal masses of Aa and Ab.
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