论文标题
在超过100 MYR的开放群集中的经典BE BE恒星研究
Study of Classical Be stars in open clusters older than 100 Myr
论文作者
论文摘要
我们进行了无狭窄的光谱调查，以识别超过100 MYR的开放簇中的经典（CBE）恒星。观察一个71个开放群集的样品，我们在11个开放群集中确定了13个CBE恒星，其中一个（TYC 2679-432-1）是一个新检测。 13个CBE恒星均显示出H $α$的排放和IR多余，这证实了它们具有气态折光盘。发现另外两颗CBE恒星首次表现出H $α$的吸收，这表明目前可能正在通过无圆盘的发作。光谱类型估计均针对所有这15颗恒星进行，并注意到它们属于B0.5 -B8类型。此外，我们发现样品的分布是预期的，B型后期峰值峰值。
We performed the slitless spectroscopic survey to identify Classical (CBe) stars in open clusters older than 100 Myr. Observing a sample of 71 open clusters, we identified 13 CBe stars in 11 open clusters, one of, which (TYC 2679-432-1) is a new detection. The 13 CBe stars show both H$α$ in emission and IR excess, which confirm that they possess gaseous circumstellar discs. Two more CBe stars are found to exhibit H$α$ in absorption for the first time, indicating that might be passing through disc-less episode presently. The spectral type estimation is done for all these 15 stars and it is noticed that they belong to B0.5 -- B8 type. Moreover, we found that the distribution of our sample is peaking near late B-types as expected.
