在对Local Group蓝色大质量恒星的精明追求中
In savvy pursuit of Local Group blue massive stars
摘要：
金属丰度在大质量恒星演化中的重要作用以及多天体摄谱仪和10米级望远镜的结合，导致了对本星系群大质量恒星的大量系统研究。虽然基于颜色的蓝色大质量恒星的探索是相对成功的，但它们必须用光谱学来证实，并且通常导致以B型中等质量恒星为主的列表。我们已经开发了一个朋友的朋友代码来寻找本星系群中的OB协会，在Garcia et al.（2009）中提出。该方法的关键之一是从无红化Q参数中选择候选OB星的光度判据，该判据可以很容易地从GALEX扩展到近红外光度学。虽然不是一个新的想法，但我们的代码的强大优势之一是自动确定成员的进化质量，从而能够快速，更有见地地选择光谱学候选人，并识别潜在的高级进化阶段。我们介绍了我们在非常贫金属的不规则IC 1613上的工作（Garcia et al. 2010）。关联性质不仅是寻找最有趣的候选大质量恒星的有力帮助，而且还揭示了星系的结构和最近的恒星形成历史。
英文摘要：
The important role of metallicity on massive star evolution and the combination of multi-object spectrographs and 10m class telescopes, have lead to numerous systematic studies of massive stars in Local Group galaxies. While color based quests of blue massive stars are relatively successful, they must be confirmed with spectroscopy and usually lead to lists dominated by B-type modest-mass stars. We have developed a friends of friends code to find OB associations in Local Group galaxies, presented in Garcia et al. (2009). One of the key points of the method is the photometric criterion to choose candidate OB stars from the reddening-free Q parameter, that could be easily extended to include from GALEX to near-IR photometry. While not a new idea, one of our code's strong advantages is the automatic determination of evolutionary masses for the members, enabling a quick and more insightful choice of candidates for spectroscopy, and the identification of potential advanced evolutionary stages. We present our work on the very metal-poor irregular IC 1613 (Garcia et al. 2010). The association properties are not only a powerful aid towards finding the most interesting candidate massive stars, but also reveal the galaxy's structure and recent star formation history.
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