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We report the detection of four new extrasolar planets in orbit around themoderately active stars HD 63765, HD 104067, HIP 70849, and HD 125595 with theHARPS Echelle spectrograph mounted on the ESO 3.6-m telescope at La Silla. Thefirst planet, HD 63765 b, has a minimum mass of 0.64MJup, a period of 358 days,and an eccentricity of 0.24. It orbits a G9 dwarf at 0.94 AU. The secondplanet, HD 104067 b, is a 3.6 Neptune-mass-planet with a 55.8-day-period. Itorbits its parent K2 dwarf, in a circular orbit with a semi-major axis ofa=0.26 AU. Radial velocity measurements present a \approx 500-day-oscillationthat reveals significant magnetic cycles. The third planet is a 0.77Neptune-mass-planet in circular orbit around the K4 dwarf, HD 12595, with a9.67-day-period. Finally, HIP 7849 b is a long-period (5< P <75 years) andmassive planet of m. sin i \approx 3.5-15 MJup that orbits a late K7 dwarf.

astronomy and astrophysics

The HARPS search for southern extrasolar planets. XXV. Four new planets  in orbit around the moderatly active dwarfs HD 63765, HD 104067, HD 125595,  and HIP 70849