We detected a brown dwarf-mass companion around the intermediate-mass giant star HD 119445 ( G6III ) using the Doppler technique .
This discovery is the first result from a Korean - Japanese planet search program based on precise radial velocity measurements .
The radial velocity of this star exhibits a periodic Keplerian variation with a period , semi-amplitude and eccentricity of 410.2 days , 413.5 m s ^ { -1 } and 0.082 , respectively .
Adopting a stellar mass of 3.9 M _ { \odot } , we were able to confirm the presence of a massive substellar companion with a semimajor axis of 1.71 AU and a minimum mass of 37.6 M _ { \mathrm { J } } , which falls in the middle of the brown dwarf-mass region .
This substellar companion is the most massive ever discovered within 3 AU of a central intermediate-mass star .
The host star also ranks among the most massive stars with substellar companions ever detected by the Doppler technique .
This result supports the current view of substellar systems that more massive substellar companions tend to exist around more massive stars , and may further constrain substellar system formation mechanisms .