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Target RA (J2000): 357.351196289062 and deg Target Dec (J2000): 36.9007797241211 and deg Gaia GMag: 9.958 Programme ID: CH_PR140079 Programme Manager: OSBORN PI of observing programme: Benz Title of programme: Axis 1 - DETECTIVE CHEOPS: Confirming small transiting planets on long orbital periods Abstract: Transiting planets orbiting bright stars are key for the characterisation of exoplanet atmospheres and internal structures. However the vast majority of such planets have short (P<20d) orbital periods. This is because long-period transiting planets do not produce consecutive transits in photometric survey data. However these planets are some of the most interesting as unlike their interior companions they are less affected by the gravitational and electromagnetic effects of their host stars. This programme will use CHEOPS to efficiently detect characterisable small transiting planets on long orbital periods. We will do this by leveraging as much external information as possible to constrain orbital periods - from nonconsecutive transits (i.e. mono- duo- or trio-transit candidates) in photometric survey data such as K2 or TESS and from radial velocities where available. Such techniques have been successful in the CHEOPS nominal mission with for example the photometrically-constrained TOI-2076 c and d (Osborn et al 2022) or the monotransit+RV case of TOI-561 d and e (Lacedelli et al 2021 and 2022). These planets once found by CHEOPS may also form interesting science targets for other parts of the GTO extended mission science case such as studying the architectural diversity of exoplanetary systems and even searches for exomoon and rings. [truncated! Please see actual data for full text]

目标赤经（Right Ascension, RA）（J2000坐标系）：357.351196289062 度；目标赤纬（Declination, Dec）（J2000坐标系）：36.9007797241211 度；盖亚G星等（Gaia GMag）：9.958；项目编号：CH_PR140079；项目主管：OSBORN；观测项目首席研究员（Principal Investigator, PI）：本茨；项目名称：轴1——"侦探CHEOPS"：验证长轨道周期小型凌日行星；摘要：凌日行星环绕明亮恒星运行，是表征系外行星大气与内部结构的核心研究对象。然而目前绝大多数此类行星的轨道周期较短（P<20天），原因在于长周期凌日行星无法在测光巡天数据中产生连续凌星事件。但这类行星却是极具科学价值的研究样本：与短周期凌日行星相比，它们受宿主恒星的引力与电磁效应干扰更小。本项目将借助CHEOPS高效探测具备表征潜力的长轨道周期小型凌日行星。具体实现方式为：充分利用各类外部信息约束轨道周期，包括K2、TESS等测光巡天数据中的非连续凌星事件（即单次、双次或三次凌星候选体），以及现有径向速度观测数据。此类技术已在CHEOPS常规任务中取得成功，例如光度约束的TOI（TESS目标天体，TESS Object of Interest）-2076 c与d（Osborn等，2022），或是结合单次凌星与径向速度数据的TOI-561 d与e（Lacedelli等，2021与2022）。通过CHEOPS发现的这类行星，还可成为GTO（保障观测时间项目，Guaranteed Time Observing）扩展任务科学计划中的优质研究目标，例如探究系外行星系统的结构多样性，乃至搜寻系外卫星与行星环。【文本已截断，请查阅完整数据以获取全部内容】