One star, two star, red star, blue star: an updated planetary nebula central star distance catalogue from Gaia EDR3
One star, two star, red star, blue star: an updated planetary nebula central star distance catalogue from Gaia EDR3
复制标题
一颗星、两颗星、红星、蓝星：Gaia EDR3 更新的行星状星云中心星距目录
DOI：
10.1051/0004-6361/202142008
复制
发表时间：
2021
影响因子：
6.5
通讯作者：
N. Walton
中科院分区：
文献类型：
--
作者：
N. Chornay;N. Walton
上下文。行星状星云(PNE)是恒星演化的一个短暂但重要的阶段。银河系PNE的研究在历史上一直受到距离不确定的阻碍，但GAIA测量的Pn中心恒星(CSPNe)的视差正在改善这种情况。目标。盖亚的S早期数据版本3(EDR3)与以前的版本相比，提供了更高的天文测量精度和更大的完整性。要利用这些改进，需要准确地识别目录中的CSPNefi。方法：研究方法。我们应用了基于似然比方法的自动化技术，将已知的PNE与Gaia EDR3中的源进行交叉匹配，使用经验得出的位置和颜色分布来为候选匹配评分。结果。我们在Gaia EDR3中提供了一个包含2000多个源的星表，我们的方法将其识别为可能的CSPNe或致密星云fi。我们展示了这些源的更精确的视差如何与以前的PN统计距离相比较，并介绍了一种组合它们以产生更紧密的距离约束的方法。我们还讨论了盖亚·S对亲密伴星和明亮星云的处理。结论。盖亚正在为PNE的研究开辟新的途径。这里提供的目录将仍然适用于即将发布的GAIA数据版本3(DR3)，因此为未来几年提供了宝贵的资源。
Context. Planetary nebulae (PNe) are a brief but important phase of stellar evolution. The study of Galactic PNe has historically been hampered by uncertain distances, but the parallaxes of PN central stars (CSPNe) measured by Gaia are improving the situation. Aims. Gaia ’s Early Data Release 3 (EDR3) offers higher astrometric precision and greater completeness compared to previous releases. Taking advantage of these improvements requires that the CSPNe in the catalogue be accurately identified. Methods. We applied our automated technique based on the likelihood ratio method to cross-match known PNe with sources in Gaia EDR3, using an empirically derived position and colour distribution to score candidate matches. Results. We present a catalogue of over 2000 sources in Gaia EDR3 that our method has identified as likely CSPNe or compact nebula detections. We show how the more precise parallaxes of these sources compare to previous PN statistical distances and introduce an approach to combining them to produce tighter distance constraints. We also discuss Gaia ’s handling of close companions and bright nebulae. Conclusions. Gaia is unlocking new avenues for the study of PNe. The catalogue presented here will remain valid for the upcoming Gaia Data Release 3 (DR3) and thus provide a valuable resource for years to come.