发表机构
Hebei Normal University; Guo Shoujing Institute for Astronomy, Hebei Normal University; Shijiazhuang Key Laboratory of Astronomy and Space Science; Yunnan observatories, Chinese Academy of Sciences; International Centre of Supernovae, Yunnan Key Laboratory（河北师范大学; 郭守敬天文台; 石家庄市天文与空间科学重点实验室; 中国科学院云南天文台; 超新星国际中心）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究利用LAMOST DR10数据，结合Gaia DR3的赫罗图与LAMOST低分辨率光谱的谱线指数，识别出34550颗OB型恒星（含6907颗新发现），还推导光谱次型、分析空间分布并识别出1960颗失控候选星。
AI 中文摘要
大样本OB型恒星在研究大质量恒星的恒星参数以及银河系的形成与演化中具有重要作用。借助大天区面积多目标光纤光谱望远镜（LAMOST）第十次数据释放（DR10），我们得以构建带光谱数据的大样本OB型恒星。本研究基于盖亚（Gaia）DR3数据构建的赫罗图（H-R图）与LAMOST DR10低分辨率光谱测得的谱线指数，从LAMOST DR10中识别出34550颗OB型恒星的48463条光谱，其中6907颗为新识别的OB型恒星。我们使用MKCLASS工具推导该OB型样本的光谱次型；25287颗OB型恒星的空间分布与20397颗OB型恒星的图姆雷（Toomre）图显示，多数恒星位于银盘。基于其特殊速度，我们识别出1960颗失控候选星。
英文摘要
A large sample of OB stars plays an important role in studying the stellar parameters of massive stars, as well as the formation and evolution of the Milky Way. With the help of the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) Data Release 10 (DR10), we are able to construct a large sample of OB stars with spectroscopic data. In this study, we identify 48,463 spectra of 34,550 OB stars from LAMOST DR10, based on the Hertzsprung-Russell (H-R) diagram constructed with Gaia DR3 data and spectral line indices measured from LAMOST DR10 low-resolution spectra. Among these, 6907 OB stars are newly identified. We use the MKCLASS tool to derive the spectral subtypes of the OB sample. The spatial distribution of 25,287 OB stars and the Toomre diagram of 20,397 OB stars indicate that the majority of these stars are located in the Galactic disk. Based on their peculiar velocities, we identify 1960 runaway star candidates.
Comments15 pages, 12 figures, 3 tables, accepted by ApJS
