Extrasolar planets and brown dwarfs around AF-type stars. X.The SOPHIE northern sample. Combining the SOPHIE and HARPS surveys to compute the close giant planet mass-period distribution around AF-type stars.

摘要: The impact of the stellar mass on giant planet properties is still to be fully understood. Main-Sequence (MS) stars more massive than Sun remain relatively unexplored in radial velocity (RV) surveys, due their characteristics that hinder classical RV measurements. Our aim characterize close (up 2.5 au) (GP) and brown dwarf (BD) population around AF MS compare this with different masses. We used SOPHIE spectrograph located 1.93m telescope at Observatoire de Haute-Provence observe 125 northern, dwarfs. our dedicated SAFIR software compute other spectroscopic observables. characterized detected sub-stellar companions computed GP BD occurrence rates combining present survey a similar HARPS survey. new data two known planetary systems F5-6V dwarfs HD16232 HD113337. For latter, we report an additional variation might induced by second wider orbit. also detection fifteen binaries or high-amplitude variations long-term trends. Based 225 targets observed HARPS, constraint frequency within 2-3 au below 4 percents (1-sigma). Jupiter-mass (periods 1000 days), found rate 3.7 (+3/-1) masses 1.5 solar masses, 6 above periods smaller 10 days, find 3 4.5 percents, respectively. results are compatible reported FGK possible increase orbital as predicted formation models.