论文标题
适用于四个著名行星星云和一个新星壳的距离映射
Distance mapping applied to four well-known planetary nebulae and a nova shell
论文作者
论文摘要
天体物理对象（例如行星星云（PNE），Nova和Supernova残留物等）的准确距离估计值，使我们能够约束它们的身体特征，例如大小，质量，亮度和年龄。一种基于膨胀视差方法的创新技术，即所谓的距离映射技术（DMT），提供了扩展星云的距离图以及其距离的估计。 DMT结合了从3D形成型模型获得的切向速度向量和观察到的适当运动向量以估计距离。我们将DMT应用于四个PNE（NGC 6702，NGC 6543，NGC 6302和BD+30 3639）和一个Nova Remnant（GK Persei），并与以前的研究非常吻合。为NGC 6543，NGC 6302和NGC 6702生成了新的简单形态形状模型，而对于BD+30 3639，使用了GK Persei发布的模型。我们证明了DMT是获得PNE距离值的有用工具，除了揭示了星云中的运动学特殊区域。距离也源自三角盖亚（Gaia）视差。还讨论了第二个GAIA数据发布中不可忽略的视差偏移的影响。
Accurate distance estimates of astrophysical objects such as planetary nebulae (PNe), and nova and supernova remnants, among others, allow us to constrain their physical characteristics, such as size, mass, luminosity, and age. An innovative technique based on the expansion parallax method, the so-called distance mapping technique (DMT), provides distance maps of expanding nebulae as well as an estimation of their distances. The DMT combines the tangential velocity vectors obtained from 3D morpho-kinematic models and the observed proper motion vectors to estimate the distance. We applied the DMT to four PNe (NGC 6702, NGC 6543, NGC 6302, and BD+30 3639) and one nova remnant (GK Persei) and derived new distances in good agreement with previous studies. New simple morpho-kinematic shape models were generated for NGC 6543, NGC 6302, and NGC 6702, whereas for BD+30 3639 and GK Persei published models were used. We demonstrate that the DMT is a useful tool to obtain distance values of PNe, in addition to revealing kinematically peculiar regions within the nebulae. Distances are also derived from the trigonometric Gaia parallaxes. The effect of the non-negligible parallax offset in the second Gaia data release is also discussed.
