Updated characterization of long-period single companion by combining radial velocity, relative astrometry, and absolute astrometry

Context . Thanks to more than 20 yr of monitoring, the radial velocity (RV) method has detected long-period companions ( P > 10 yr) around several dozens stars. Yet, true nature these remains unclear because uncertainty as inclination companion orbital plane. Aims We wish constrain and mass single companions. Methods used a Markov chain Monte Carlo (MCMC) fitting algorithm combine RV measurements with absolute astrometry and, when available, relative data. Results have lifted sin( i ) indetermination for seven find masses in planetary range candidate planets following systems: Epsilon Indi A, HD 13931, 115954, 222155. The 219077 b is close deuterium-burning limit its uncertain imprecise host star. Using additional measurements, we refine parameters HIP 70849 range. By combining data astrometry, significantly improve characterization 211847 B properly determine mass, which appears be low-mass star This work illustrates how Gaia H IPPARCOS allow properties further constrained.