论文标题
带有Gaia Edr3的北美/鹈鹕星云中主要电离恒星的距离和切向速度
Distance and Tangential Velocity of the Main Ionizing Star in the North America/Pelican Nebulae with Gaia EDR3
论文作者
论文摘要
Bajamar Star是一颗早期的O恒星，它使北美/鹈鹕星云电离。在投影中，它位于H II区域的几何中心附近，但似乎位于任何主要恒星亚组之外。此外，在Gaia Dr2中，该恒星与系统的其余部分之间存在微微差异（2 $σ$较大）和相对切向速度（〜6 km/s）。使用Gaia EDR3，我们发现视差差异已经消失，但速度差异仍然存在。这些结果与从亚组逃脱的恒星一致。
The Bajamar Star is an early O star that ionizes the North America/Pelican Nebulae. In projection, it is near the geometric center of the H II region, but appears to lie outside any of the main stellar subgroups. Furthermore, in Gaia DR2, there were slight discrepancies between this star and the rest of the system in parallax (2$σ$ larger) and relative tangential velocity (~6 km/s). Using Gaia EDR3, we find that the parallax discrepancy has disappeared, but the velocity difference remains. These results are consistent with the star having escaped from a subgroup.
