论文标题
从Lamost MRS调查中识别新古典BE恒星
Identification of new classical Be stars from the LAMOST MRS survey
论文作者
论文摘要
BE恒星是B型主序列恒星，它们在光谱中显示宽阔的Balmer发射线。识别人群对于进一步研究形成和进化模型至关重要。我们报告了与大型天空区域多对象纤维光谱望远镜媒体中分辨率7日期版本7（Lamost MRS MRS MRS DR7）的观测值（Lamost MRS MRS DR7），从观测值中发现了经典BE（CBE）恒星。我们使用了一个深卷积神经网络Resnet，并带有18层模块来检查H alpha谱的形态。我们确定了1,162个候选者是数据库中789,918星的2,260,387光谱中的恒星。 Resnet网络可实现99.5％的恒星分类精度。在检测中，其中151个是从文献中交叉匹配的恒星。通过应用三步测试，我们确定了183个新的CBE恒星。我们发现41个CBE恒星是已知的开放群集的成员。基于对Gaia EDR3星体溶液鉴定的CBE恒星运动学的研究，我们确定了16个新的逃亡者。这些新的标识将为将来的随访提供参考，以进一步研究其物理特性。
Be stars are B-type main-sequence stars that display broad Balmer emission lines in their spectra. Identification of Be population is essential to further examine the formation and evolutionary models. We report the detection of classical Be (CBe) stars from observations with the Large sky Area Multi-Object fiber Spectroscopic Telescope Medium Resolution Survey of Date Release 7 (LAMOST MRS DR7). We used a deep convolutional neural network, the ResNet, with an 18-layer module to examine the morphology of the H alpha profile. We identified 1,162 candidate Be stars from the collection of 2,260,387 spectra for 789,918 stars in the database. The ResNet network achieves a Be star classification accuracy of 99.5%. Among the detections, 151 of these are prior known Be stars cross-matched from the literature. By applying a three-step test, we identified 183 new CBe stars. We find that 41 CBe stars are members of known open clusters. Based upon an investigation of the kinematics of the identified CBe stars from the Gaia EDR3 astrometric solutions, we identified 16 new runaways. These new identifications will provide a reference for future follow-ups to further investigate their physical properties.
