Speaker
Description
The dependence of cold Jupiter occurrence on host-star parameters (e.g. mass or metallicity) remains a key question in giant-planet demographics. In particular, current statistics for intermediate-mass stars (1.5 - 4 M⊙) can still be improved, as the number of reported planets around these targets is low (<250) and affected by stellar-variability false positives (e.g. oscillations). I will present results from a 20-year RV survey of evolved intermediate-mass stars conducted with the CORALIE spectrograph. With more than 600 targets and an RV precision of ~5 m/s, this survey provides one of the largest homogeneous datasets for this stellar population. The sample reveals >50 previously unpublished giant-planet candidates, predominantly with Jovian masses and orbits in the 1-10 AU range. These data enable a determination of cold Jupiter occurrence rates as a function of stellar mass and metallicity in the intermediate-mass regime, and I will discuss how the resulting demographics compare with those from FGK stars and current predictions.
