The Bayesian analysis revealed GU Psc A, an
M3 star, to have a high probability of belonging to the 70-130 million-year-old AB Doradus Moving Group (ABDMG). The radial velocity estimated by the analysis agrees with
the value we measured on our optical and
near-infrared (NIR) spectra, which further
confirm the membership. These radial-velocity data were obtained with the Phoenix
spectrometer at Gemini South, CRIRES at the
VLT, and ESPaDOnS at CFHT.
The star’s X-ray luminosity is also consistent
with that of ABDMG members. Furthermore, the many youth indicators we studied
all agreed with GU Psc A being part of the
ABDMG. A parallax measurement, ongoing
through the Cerro Tololo Inter-American
Observatory Parallax Investiga ѥ