$π$地球：一个3. 14天地球大小的行星，来自$\textit{K2}$的厨房，由SPECULOOS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
摘要：
我们报告了在57 $\,$ pc，K2- 315 b的M3.5矮星周围发现一颗凌日地球大小（0.95 $R_\oplus$）的行星。该行星的周期为$\sim$ 3.14天，即${\sim}π$，星座为7.45 $\,$ S $_{\oplus}$。该检测是使用来自$\textit{K2}$的Campaign 15的公开数据进行的。我们观察到三个额外的凌日与SPECULOOS南方和北方天文台，以及来自Keck/HIRES的恒星光谱，这使我们能够验证信号的行星性质。这颗被确认的行星非常适合比较地球系外行星学。虽然经过超冷矮星的系外行星为使用$\textit{James Webb Space Telescope}$进行类地系外行星大气研究提供了最佳机会，但那些在100 $\,$ pc范围内围绕中M矮星运行的系外行星，如K2- 315 b，将越来越容易通过下一代天文台获得。
英文摘要：
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.
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。
