AI 中文总结
该研究利用盖亚DR3数据，通过HDBSCAN聚类对太阳附近年轻恒星群进行研究，得出145个包含5713颗恒星的星群，导出稳定的拉尔森关系，为研究恒星形成区域运动学遗产建立了基准。
AI 中文摘要
恒星形成区域是理解恒星形成和早期演化的关键。年轻恒星天体（YSO）形成具有独特运动学和空间特性的星群，这些特性继承自其母分子云的湍流动力学。盖亚数据发布3（DR3）的高精度天体测量和光度测量能够详细研究这些星群的三维运动及其演化稳定性。本研究旨在调查太阳附近YSO星协的运动学特性和演化一致性。我们展示了对盖亚DR3数据进行HDBSCAN聚类得到了145个YSO星群，包含1千秒差距内的5713颗恒星，导出的拉尔森关系为\(\sigma_v = (1.10 \pm 0.13) \times r^{0.38 \pm 0.03}\)，在年龄达2000万年的年龄区间内一致。该斜率与标准值0.38以及典型范围0.4 - 0.5相符。各年龄稳定的拉尔森关系表明从母云继承的湍流结构持续存在且无显著破坏。这些发现为研究恒星形成区域的运动学遗产建立了基准。
英文摘要
Star-forming regions are key to understanding the formation and early evolution of stars. Young stellar objects (YSOs) form groups with distinct kinematic and spatial properties, inherited from the turbulent dynamics of their parent molecular clouds. The high-precision astrometry and photometry from Gaia Data Release 3 (DR3) enable detailed studies of these groups' three-dimensional motions and their evolutionary stability. This study aims to investigate the kinematic properties and evolutionary consistency of YSO associations in the solar neighbourhood. Here, we show that HDBSCAN clustering of Gaia DR3 data yields 145 YSO groups comprising 5713 stars within 1 kpc, with a derived Larson's relation of $σ_v = (1.10 \pm 0.13) \times r^{0.38 \pm 0.03}$, consistent across age bins up to 20 Myr. This slope aligns with the canonical value of 0.38 and typical ranges of 0.4--0.5. The stable Larson's relation across ages indicates that the inherited turbulent structure from parent clouds persists without significant disruption. These findings establish a benchmark for studying the kinematic legacy of star-forming regions.
Comments12 pages, 7 figures, accepted for publication in MNRAS
