用光谱和成像观测探测恒星的双重性对行星发生的影响
Probing the Impact of Stellar Duplicity on Planet Occurrence with Spectroscopic and Imaging Observations
摘要：
虽然人们普遍认为，一个亲密的恒星伴星的存在很可能会影响行星形成和演化，精确的效果和它们对行星的发生和性质的实际影响仍然存在争议。特别是，观测的限制是稀疏的，多普勒行星搜索中对近距离双星的歧视的结果。为了对双星和多星中行星的发生和性质进行观测限制，我们一直在进行两个专门的观测计划，使用自适应光学成像和径向速度监测。在这一章中，我们将解释我们的方法，并提出这两个程序的初步结果。对我们的VLT/NACO成像调查数据的简化统计分析带来了第一个观测证据，即行星的出现在距离120 AU更近的双星中减少。在径向速度方面，目前的结果证实，使用二维相关允许在许多类型的光谱联星中搜索环主巨行星。从我们正在进行的行星搜索光谱联星的成果应产生重要的限制，最近的联星容易主办环主星巨行星。
英文摘要：
Although it is commonly agreed that the presence of a close stellar companion is likely to affect planet formation and evolution, the precise effects and their actual impact on planet occurrence and properties are still debated. In particular, observational constraints are sparse, a consequence of the discrimination against close binaries in Doppler planet searches. To bring observational constraints on the occurrence and properties of planets in binaries and multiple stars, we have been conducting two dedicated observing programs using both adaptive optics imaging and radial-velocity monitoring. In this chapter we explain our approach and present preliminary results from these two programs. A simplified statistical analysis of the data from our VLT/NACO imaging survey brings the first observational evidence that the occurrence of planets is reduced in binaries closer than ~120 AU. On the radial-velocity side, current results confirm that the use of two-dimensional correlation allows to search for circumprimary giant planets in many types of spectroscopic binaries. Definitive results from our ongoing planet search in spectroscopic binaries should yield important constraints on the closest binaries susceptible of hosting circumprimary giant planets.
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