PLANETS AND BROWN DWARFS AROUND A—FMAIN-SEQUENCE STARS: PERFORMANCES OFRADIAL-VELOCITY SURVEYS WITH HARPS AND FIRST DETECTIONS

摘要

Due to their high v sin i, early-type main-sequence stars have been considered as unsuitable targets for radial-velocity surveys. Know-ing about the presence of planets around those stars is however a key issue to understand the impact of the mass of the central star on the way planets form and evolve. We developped in recent years a method that allows to search for planets around those stars and started radial-velocity surveys focused on these targets. We report here some results obtained so far in terms of performances and detection.