HARPS搜寻南太阳系外行星。XXV。四颗新行星围绕中等活跃的矮星HD 63765，HD 104067，HD 125595和HIP 70849运行
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
摘要：
我们报告了四个新的太阳系外行星在轨道周围的中等活跃的恒星HD 63765，HD 104067，HIP 70849和HD 125595与HARPS Echelle摄谱仪安装在ESO的3.6米望远镜在拉西拉。第一颗行星HD 63765 b的最小质量为0.64 MJup，周期为358天，离心率为0.24。它以0.94天文单位绕着一颗G9矮星运行。第二颗行星HD 104067 b是一颗质量为3.6海王星的行星，周期为55.8天。它围绕母星K2矮星运行，其轨道是一个半长轴为a=0.26天文单位的圆形轨道。径向速度测量呈现出\approx 500天的振荡，揭示了显着的磁循环。第三颗行星是一颗质量为0.77海王星的行星，环绕着K4矮星HD 12595，周期为9.67天。最后，HIP 7849 b是一颗长周期（5< P <75年）的大质量行星。Sin i \approx 3.5-15 MJup，围绕一颗K7晚期矮星运行。
英文摘要：
We report the detection of four new extrasolar planets in orbit around the moderately active stars HD 63765, HD 104067, HIP 70849, and HD 125595 with the HARPS Echelle spectrograph mounted on the ESO 3.6-m telescope at La Silla. The first 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 second planet, HD 104067 b, is a 3.6 Neptune-mass-planet with a 55.8-day-period. It orbits its parent K2 dwarf, in a circular orbit with a semi-major axis of a=0.26 AU. Radial velocity measurements present a \approx 500-day-oscillation that reveals significant magnetic cycles. The third planet is a 0.77 Neptune-mass-planet in circular orbit around the K4 dwarf, HD 12595, with a 9.67-day-period. Finally, HIP 7849 b is a long-period (5< P <75 years) and massive planet of m. sin i \approx 3.5-15 MJup that orbits a late K7 dwarf.
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