论文标题
9个月过渡系外行星HIP41378 D的Rossiter-McLaughlin检测
Rossiter-McLaughlin detection of the 9-month period transiting exoplanet HIP41378 d
论文作者
论文摘要
Rossiter-McLaughlin（RM）效应是一种使我们能够测量行星轨道倾斜的方法，这是一种重要的约束，用于了解行星的形成和迁移机制，尤其是对于热木星而言。在本文中，我们介绍了对海王星大小的长周期planet hip41378 d的RM观察。这些观察是使用HARPS-N/TNG和ESPRESSO/ESO-VLT光谱仪在2019年和2022年的两个过境事件中获得的。与经典RM和RM旋转方法对数据的分析使我们能够确认该星球的轨道时期是278天，并且与obliquiquique compection uquique” 57.1+26.4-17.9度，这两种方法之间是一致的值。 HIP41378 D是迄今为止倾斜的最长时期行星。对于2019年和2022年，我们没有以30分钟和100分钟的精度检测到运输时机变化。该结果还表明，RM效应提供了一种解决方案，可以从地面进行后续行动，即小型和长期行星的过境，例如即将到来的ESA柏拉图任务将检测到的行星。
The Rossiter-McLaughlin (RM) effect is a method that allows us to measure the orbital obliquity of planets, which is an important constraint that has been used to understand the formation and migration mechanisms of planets, especially for hot Jupiters. In this paper, we present the RM observation of the Neptune-sized long-period transiting planet HIP41378 d. Those observations were obtained using the HARPS-N/TNG and ESPRESSO/ESO-VLT spectrographs over two transit events in 2019 and 2022. The analysis of the data with both the classical RM and the RM Revolutions methods allows us to confirm that the orbital period of this planet is 278 days and that the planet is on a prograde orbit with an obliquity of $λ$ = 57.1+26.4-17.9 degrees, a value which is consistent between both methods. HIP41378 d is the longest period planet for which the obliquity was measured so far. We do not detect transit timing variations with a precision of 30 and 100 minutes for the 2019 and 2022 transits, respectively. This result also illustrates that the RM effect provides a solution to follow-up from the ground the transit of small and long-period planets such as those that will be detected by the forthcoming ESA's PLATO mission.
