论文标题
$π$ Earth：一个3.14天的地球大小的星球，来自$ \ textit {k2} $的厨房，由peculoos团队提供温暖
$π$ Earth: a 3.14-day Earth-sized Planet from $\textit{K2}$'s Kitchen Served Warm by the SPECULOOS Team
论文作者
论文摘要
我们报告了一个在M3.5矮星的57 $ \，$ PC，K2-315B的M3.5矮星周围发现了一个过渡地球大小（0.95 $ r_ \ oplus $）的行星。该星球的期限为$ \ sim $ 3.14天，即$ {\ sim}π$，其Intellation为7.45 $ \，$ s $ _ {\ oplus} $。该检测是使用$ \ textit {k2} $的广告系列15的公开数据进行的。我们观察到了与Speculoos Southern和Northern观测值进行的三个额外的转移，以及Keck/Hires的出色频谱，这使我们能够验证信号的行星性质。确认的行星非常适合比较陆地术。虽然外部型超级矮矮人为$ \ textit {james webb space望远镜} $提供了大气研究的大气研究，但那些在100 $ \内绕中的中间矮人的人，$ \ \ $ \ $ \ $ dwarfs，例如K2-315b的PC将变得越来越多地与下一代观察者访问。
We report on the discovery of a transiting Earth-sized (0.95$R_\oplus$) planet around an M3.5 dwarf star at 57$\,$pc, K2-315b. The planet has a period of $\sim$3.14 days, i.e. ${\sim}π$, with an instellation of 7.45$\,$S$_{\oplus}$. The detection was made using publicly available data from $\textit{K2}$'s Campaign 15. We observed three additional transits with SPECULOOS Southern and Northern Observatories, and a stellar spectrum from Keck/HIRES, which allowed us to validate the planetary nature of the signal. The confirmed planet is well suited for comparative terrestrial exoplanetology. While exoplanets transiting ultracool dwarfs present the best opportunity for atmospheric studies of terrestrial exoplanets with the $\textit{James Webb Space Telescope}$, those orbiting mid-M dwarfs within 100$\,$pc such as K2-315b will become increasingly accessible with the next generation of observatories.
