标题： 欧洲航天局欧几里得空间任务之后的亚恒星科学 显示英文标题

标题： Substellar science in the wake of the ESA Euclid space mission

摘要： 欧洲航天局的太空任务欧几里得（Euclid）于2023年7月1日发射，并正在进行科学验证阶段。在这篇受邀综述中，我们展示欧几里得对我们理解超冷矮星和亚恒星质量天体及其与恒星、系外行星以及银河系之间联系的意义重大。欧几里得使得以前所未有的统计显著性研究非常大的超冷矮星样本、识别新的亚恒星天体类型、确定亚恒星双星比例和初始质量函数（IMF）成为可能，这些研究涵盖了从最近的恒星摇篮到银河系古老遗迹的各种银河环境。 显示英文摘要

摘要： The ESA space mission Euclid was launched on July 1st, 2023 and is undergoing its science verification phase. In this invited review we show that Euclid means a before and an after for our understanding of ultra-cool dwarfs and substellar-mass objects and their connections with stars, exoplanets and the Milky Way. Euclid enables the study with unprecedented statistical significance a very large ensemble of ultracool dwarfs, the identification of new types of substellar objects, and the determination of the substellar binary fraction and the Initial Mass Function (IMF) in diverse galactic environments from the nearest stellar nurseries to the ancient relics of Galactic formation.