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Study of Planetary Systems around Giant Stars

机译:巨星周边系统的研究

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More than 450 exoplanets have currently been detected, most of them by the radial velocity (RV) technique. While the majority of exoplanets have been found around main-sequence (MS) FGK stars (M ≤ 1.5M⊙), only a small fraction (~ 10%) have been discovered orbiting post-MS stars. However, such stars are known to host exoplanets and the detection fraction appears to be larger than for solar-type dwarfs. To date ~30 planets have been found orbiting giant stars which have revealed interesting properties that contrast with the results found for solar-type stars. We are carrying out a RV search for planets around giant stars in the southern hemisphere in order to study different formation scenarios for planets around intermediate-mass stars and the effect of the post-MS evolution of the host stars on the orbits of close-in planets (a ≤ 0.6 AU).
机译:目前已检测到超过450个外产网,其中大多数由径向速度(RV)技术。虽然大部分外产术围绕主序列(MS)FGK恒星(M≤1.5m³),但仅发现了小部分(〜10%)的轨道后MS恒星。然而,已知这些恒星宿主外产凸片,并且检测分数似乎大于太阳能型矮种。迄今为止〜30个行星已经发现轨道巨头明星,揭示了与太阳能型恒星的结果形成鲜明对比的有趣特性。我们正在在南半球围绕巨星周围的行星进行RV搜索行星,以研究中间群星周围的行星的不同形成情景以及主题恒星的后毫秒演变在近距离的轨道上的效果行星(a≤0.6au)。

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