论文标题
基于Gaia EDR3的行星星云的新统计距离量表
A new statistical distance scale for planetary nebulae, based on Gaia EDR3
论文作者
论文摘要
目前的工作旨在基于严格的校准样本建立一个新的行星星云（PNE）（PNE）的统计距离量表。校准样品的距离是使用Gaia早期第三个数据释放（GAIA EDR3）的最新测量的三角视差方法得出的。新的距离尺度是通过应用无线电表面亮度温度和变形线半径之间的众所周知的线性关系而创建的。校准样品由96个PNE精确计算的距离组成，不确定性小于$ 20 \％$。 pne的早期基于地面和空间的三角视差与Gaia的前后矛盾，尤其是河马结果。此外，这些测量值的精度明显低于盖亚。与三角技术相比，扩展和运动学方法比光谱，消光，重力和光电发方法表现出更高的一致性。此外，与文献相反，平均而言，灭绝和重力方法低估了PN距离。作为提取Gaia视差的副产品，我们分别检测到14和3 PN中心星（CSS）的径向速度和可变性。据我们所知，首次确定了母鸡2-447 CS的变异性。
The present work aims to build a new statistical distance scale for planetary nebulae (PNe) based on a rigorous calibration sample. The distances of the calibration sample are derived from the trigonometric parallax method using the recent measurements of Gaia early third data release (Gaia EDR3). The new distance scale is created by applying the well-known linear relationship between the radio surface brightness temperature and the nebular radius. The calibration sample is made up of 96 PNe of accurately computed distances with uncertainties less than $20\%$. Earlier ground- and space-based trigonometric parallaxes of PNe display inconsistency with those of Gaia, particularly the HIPPARCOS results. In addition, these measurements have appreciably lower precision than that of Gaia. When compared to the trigonometric technique, the expansion and kinematic methods exhibited more consistency than the spectroscopic, extinction, gravity, and photo-ionization methods. Furthermore, contrary to earlier results in the literature, the extinction and gravity methods, on average, underestimate and slightly overestimate the PN distances. As a byproduct of extracting the Gaia parallaxes, we detect the radial velocity and variability for 14 and 3 PN central stars (CSs), respectively. To our knowledge, the variability of Hen 2-447 CS has been determined for the first time.
