论文标题
OB协会及其起源
OB associations and their origins
论文作者
论文摘要
OB协会是未结合的年轻明星群体，其明亮的OB成员引起了人们的关注，长期以来，人们一直认为是浓密的星团群的扩大残留物。由于他们的低质量成员直到最后几十年才对其低质量的成员进行研究，但由于其发光的大型恒星，它们在天体物理学中一直很重要。由于X射线观察，盖亚的光谱调查和天文学的数据，这使情况发生了变化，从而允许确定其完整的出色内容并研究它们的动态，这又导致我们对这些系统及其起源的理解发生了变化，而Blaauw（1964）（1964年）的旧图片（现在）被超过了。现在很明显，OB关联在空间，运动学上和时间上都比以前所设想的要多得多。这些变化对恒星形成过程，行星系统的形成和演变以及跨星系中恒星种群的积累具有影响。
OB associations are unbound groups of young stars made prominent by their bright OB members, and have long been thought to be the expanded remnants of dense star clusters. They have been important in astrophysics for over a century thanks to their luminous massive stars, though their low-mass members have not been well studied until the last couple of decades. This has changed thanks to data from X-ray observations, spectroscopic surveys and astrometry from Gaia that allows their full stellar content to be identified and their dynamics to be studied, which in turn is leading to changes in our understanding of these systems and their origins, with the old picture of Blaauw (1964) now being superseded. It is clear now that OB associations have considerably more substructure than once envisioned, both spatially, kinematically and temporally. These changes have implications for the star formation process, the formation and evolution of planetary systems, and the build-up of stellar populations across galaxies.
