论文标题
Gaia DR2和EDR3数据以及高径向速度的AGB后星的进化状态
Gaia DR2 and EDR3 data and evolutionary status of post-AGB stars with high radial velocities
论文作者
论文摘要
使用GAIA DR2和EDR3数据以及AGB候选后的列表，我们研究了二十个AGB恒星和具有高径向速度的候选者的视差，适当的运动和二进制。从盖亚（Gaia）的距离范围内，它们的亮度和运动学得出。这些恒星的进化状态是从它们在AGB后进化轨道上的位置讨论的。确认有九颗恒星为AGB后恒星，其最初的主要序列质量在一个或两个太阳能附近。从它们的运动学信息中，其中两个对象被确定为显然属于光环群，这表明低质量。我们讨论了以高径向速度的样本样本中其他对象的起源和进化状态。
Using the Gaia DR2 and EDR3 data and list of post-AGB candidates, we investigate the parallax, proper motion and binarity for twenty post-AGB stars and candidates having high radial velocities. From their Gaia distances their luminosities and kinematics are derived. The evolutionary status of these stars is discussed from their location on the post-AGB evolutionary tracks. Nine stars are confirmed to be post-AGB stars that have their initial main-sequence mass around one or two solar masses. From their kinematics information, two objects among them are identified to clearly belong to the halo population, suggesting that low-mass. We discuss on the origin and evolutionary status of other objects in the sample of this work with high radial velocities.
