Fig. 5
The motion of component TWA 5B relative to Aa. The observed positions are marked by their error ellipses and lines connecting the observed and calculated position at the time of the observations. The dashed line is the Kepler-orbit around the center of mass of Aa and Ab. The solid line is our best fit for the motion of B relative to Aa. The dotted line is the best fit if the mass ratio Aa/Ab is fixed at 1 or equal masses.
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