论文标题
振动：视觉二进制外部系外行星调查，在宽S型和S-BD频率，三重系统发现以及20个恒星二进制的星体确认和三个三重系统上，带有球的上限。
VIBES: VIsual Binary Exoplanet survey with SPHERE Upper limits on wide S-planet and S-BD frequencies, triple system discovery, and astrometric confirmation of 20 stellar binaries and three triple systems
论文作者
论文摘要
最近的调查表明，二进制系统中的行星比以前想象的要丰富，这与二进制中的圆盘动力学和行星形成的理论工作一致。为了测量二进制系统中宽轨巨型系外行星的丰度和物理特征，我们设计了“带有球体的视觉二进制外部系外行星调查”（Vibes）（氛围）以在视觉二进制中搜索行星。它使用VLT的球形仪器在23个视觉二进制和四个视觉三重系统中搜索行星，年龄<145 MYR且距离<150 pc。我们在球体上使用了IRDIS双频成像仪来获取样品目标的高对比度图像。对于每个二进制，同时观察到这两个组成部分，仅冠状掩盖了主要恒星。对于三颗星，将紧密组件视为单颗恒星，以减少数据。这使我们能够有效地搜索约50个单独的二角恒星和四个二进制组的同伴。我们在视觉二进制中的原始人的频率中得出了$ <$ 13.7 \％的$ <$ 13.7 \％，$ 26.5 \％的$ <$ <$ 26.5 \％的视觉二进制中心伴侣的一部分，以及巨型Planets和Brown Planets and Brown Planets and Brown Planets and Brown Planet和Brown dwarfs of Vistution commoce of Visution bin bin bin bin。我们已经将观察结果与文献测量结果结合在一起，以首次在星体统计的情况下确认20个二进制文件和两个以前已知的三重系统确实是物理上结合的。最后，我们发现了二进制HD〜121336的第三部分。我们得出的上限与行星形成通过核心积聚和二进制中的重力不稳定性过程兼容。这些限制也与针对单星和环形行星搜索调查发现的限制一致。
Recent surveys indicate that planets in binary systems are more abundant than previously thought, which is in agreement with theoretical work on disc dynamics and planet formation in binaries. In order to measure the abundance and physical characteristics of wide-orbit giant exoplanets in binary systems, we have designed the 'VIsual Binary Exoplanet survey with Sphere' (VIBES) to search for planets in visual binaries. It uses the SPHERE instrument at VLT to search for planets in 23 visual binary and four visual triple systems with ages of <145 Myr and distances of <150 pc. We used the IRDIS dual-band imager on SPHERE to acquire high-contrast images of the sample targets. For each binary, the two components were observed at the same time with a coronagraph masking only the primary star. For the triple star, the tight components were treated as a single star for data reduction. This enabled us to effectively search for companions around 50 individual stars in binaries and four binaries in triples. We derived upper limits of $<$13.7\% for the frequency of sub-stellar companions around primaries in visual binaries, $<$26.5\% for the fraction of sub-stellar companions around secondaries in visual binaries, and an occurrence rate of $<$9.0\% for giant planets and brown dwarfs around either component of visual binaries. We have combined our observations with literature measurements to astrometrically confirm, for the first time, that 20 binaries and two triple systems, which were previously known, are indeed physically bound. Finally, we discovered a third component of the binary HD~121336. The upper limits we derived are compatible with planet formation through the core accretion and the gravitational instability processes in binaries. These limits are also in line with limits found for single star and circumbinary planet search surveys.
