Super-Earths and Neptune-mass planets: a window to planetary-system diversity
Université de Genève
Tue, Oct. 02nd 2012, 11:00
Salle Claude Itzykson, Bât. 774, Orme des Merisiers
I will report on the results of an 8-year survey carried out at the La Silla Observatory with the HARPS spectrograph to detect and characterize planets in the super-Earth and Neptune-mass regime. The size of our star sample and the precision achieved with HARPS have led to the detection of a sufficiently large number of low-mass planets to study the statistical properties of their orbital elements, the correlation of host-star properties with the planet masses, as well as the occurrence rate of planetary systems around solar-type stars. These results will be discussed in comparison with equivalent results obtained in our M-dwarf survey and with the recent Kepler findings.