年轻凌日行星候选者CVSO 30 b的YETI观测
YETI observations of the young transiting planet candidate CVSO 30 b
摘要：
CVSO 30是一个独特的年轻低质量系统，因为它首次在一个共同的主恒星周围发现了一个近距离凌日和一个广泛的直接成像行星候选者。内伴星CVSO 30 b是第一颗可能的年轻凌日行星，它围绕着一颗先前已知的弱线金牛座T星运行。利用位于亚洲，欧洲和南美洲的“年轻系外行星过境计划”（YETI）的五台望远镜，我们在三年内总共监测了CVSO 30的144个夜晚，并检测到33个衰落事件。在接下来的两个季节里，我们用三台望远镜进行了后续观测。我们可以证实，在不同的观测之间，衰落事件的形状会发生变化，衰落事件甚至会消失和再现。共38个衰落事件光变曲线同时建模。我们推导出该系统的行星、恒星和几何性质，发现它们略小，但与发现论文中的值一致。发现衰落事件的周期比以前公布的值短1.36 s，精确100倍。如果CVSO 30 b是一颗在进动轨道上的巨行星，我们还不能确认，那么进动周期可能比以前认为的要短。但如果确认为行星，它将是有史以来发现的最年轻的过境行星，并将提供重要的限制行星形成和迁移的时间尺度。
英文摘要：
CVSO 30 is a unique young low-mass system, because, for the first time, a close-in transiting and a wide directly imaged planet candidates are found around a common host star. The inner companion, CVSO 30 b, is the first possible young transiting planet orbiting a previously known weak-lined T-Tauri star. With five telescopes of the 'Young Exoplanet Transit Initiative' (YETI) located in Asia, Europe and South America we monitored CVSO 30 over three years in a total of 144 nights and detected 33 fading events. In two more seasons we carried out follow-up observations with three telescopes. We can confirm that there is a change in the shape of the fading event between different observations and that the fading event even disappears and reappears. A total of 38 fading event light curves were simultaneously modelled. We derived the planetary, stellar, and geometrical properties of the system and found them slightly smaller but in agreement with the values from the discovery paper. The period of the fading event was found to be 1.36 s shorter and 100 times more precise than the previous published value. If CVSO 30 b would be a giant planet on a precessing orbit, which we cannot confirm, yet, the precession period may be shorter than previously thought. But if confirmed as a planet it would be the youngest transiting planet ever detected and will provide important constraints on planet formation and migration time-scales.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
