PSU/TCfA搜寻演化恒星周围的行星：红巨星样本活动的平分线分析
The PSU/TCfA Search for Planets Around Evolved Stars: Bisector Analysis of Activity of a Sample of Red Giants
摘要：
对演化的G-K亚巨星和巨星周围行星的研究对于发展对行星形成和行星系统演化的一般认识是必不可少的。对巨星的精确径向速度（RV）测量已经导致在这样的恒星周围发现了十颗行星。然而，红巨星的长周期径向速度变化也可能具有行星性质以外的性质。由于恒星黑子的非径向振荡或旋转调制也可以引起RV变化，从而模仿低质量伴星的引力影响。在这项工作中，我们提出了平分线分析五个精心挑选的两颗星从我们的调查。
英文摘要：
Searches for planets around evolved G-K subgiant and giant stars are essential for developing general understanding of planet formation and evolution of the planetary systems. Precise radial velocity (RV) measurements of giants have lead to the discovery of ten planets around such star. However, the long period radial velocity variations of red giants may also have other than planetary nature. Non-radial oscillations or rotational modulation due to starspots can also induce RV variations, thereby mimicking the gravitational influence of low-mass companions. In this work we present bisector analysis of five carefully selected lines for two stars from our survey.
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