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Orbital phases in spectroscopy plots

Plots of the radial velocity curves versus orbital phase can be made for all three components using the widget PLOTSPECTROSCOPY. When plotting the velocity curves for the individual components of a triple versus orbital phase the lowest hierarchical component is used to calculate the phase. For components A and B the A-B orbital parameters are used to calculate the phase. For component C the AB-C orbit parameters in the model are used to calculate the orbital phase. Plotted velocities of lower level components will have the contribution from higher components removed. In this example with velocity data for all three components the close binary orbit is used to calculate orbital phase for components A and B. The plotted velocities of components A and B will have the velocity of component C removed.

Christian Hummel 2017-06-29