14 juin - 17 juin 2016


S05 R��union des utilisateurs des t��lescopes fran��ais (TBL/OHP193)

The mass-period distribution of close (0.02 - 2 au) giant planets around A-F Main-Sequence stars.

S. Borgniet, A.-M. Lagrange, N. Meunier, F. Galland

The impact of stellar mass on the formation, early evolution and final properties of close (up to ~2 au) planets is still to be fully understood. While 'solar-like' FGK dwarfs and lower-mass KM dwarfs have been widely observed with RV and transits, massive, AF Main-Sequence stars have remained mostly unexplored, due to their characteristics that prevent the classical RV computation.

In the last 11 years, we have realized the first significant RV survey of massive AF MS stars to search for giant planets and brown dwarfs, based on SOPHIE and HARPS observations and on an alternative RV computation method. I will introduce here the results of the SOPHIE survey as well the statistical analysis based on the combined HARPS and SOPHIE surveys. This analysis allows to derive for the first time an estimation of the close giant planet occurrence rate around AF Main-Sequence stars.

Finally, I will also briefly introduce our ongoing SOPHIE RV program to search for giant planets around young, nearby stars.