We present new radial velocity measurements of eight stars secured with the spectrograph SOPHIE at the 193-cm telescope of the Haute-Provence Observatory allowing the detection and characterization of new giant extrasolar planets .
The host stars are dwarfs of spectral types between F5 and K0 and magnitudes between 6.7 and 9.6 ; the planets have minimum masses M _ { \textrm { p } } \sin i between 0.4 to 3.8 M _ { \mathrm { Jup } } and orbital periods of several days to several months .
The data allow only single planets to be discovered around the first six stars ( HD 143105 , HIP 109600 , HD 35759 , HIP 109384 , HD 220842 , and HD 12484 ) , but one of them shows the signature of an additional substellar companion in the system .
The seventh star , HIP 65407 , allows the discovery of two giant planets , just outside the 12:5 resonance in weak mutual interaction .
The last star , HD 141399 , was already known to host a four-planetary system ; our additional data and analyses allow new constraints to be put on it .
We present Keplerian orbits of all systems , together with dynamical analyses of the two multi-planetary systems .
HD 143105 is one of the brightest stars known to host a hot Jupiter , which could allow numerous follow-up studies to be conducted despite this is not a transiting system .
The giant planets HIP 109600b , HIP 109384b , and HD 141399c are located in the habitable zone of their host star .