Deriving the true mass of an unresolved Brown Dwarf companion to an M-Dwarf with AO aided astrometry*
From radial velocity (RV) detections alone one does not get all orbital parameters needed to derive the true mass of a non-transiting, unresolved substellar companion to a star.Additional astrometric measurements are needed to calculate the inclination and the longitude of the ascending node.Until today only few true substellar companion masses hav