Hello Robin,
assumed the same configuration as in the URL of the project SPADES (see the graph below): a planet moves around a binary pair.
Then the system velocity of the binary system should have a sinus like variation.
The system velocity is a result of RV measurements (as I have done on Mizar A). Theoretical it could be possible to measure that, but
* the period P of the pair should be short to get enough revolutions in some years of observations
* the measurements of the orbit parameters, especially the system velocity, have to be very precise
* the effect of the planet should be strong on the barycenter of both stars (masses).
There should be made a theoretical calculation of the effect to guess the need of precision of the measurement of the orbit parameters.
An interesting question !!!!!
Cheers,
Lo
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