The post-common-envelope binary central star of the planetary nebula PN G283.7-05.1 A possible post-red-giant-branch planetary nebula central star
The post-common-envelope binary central star of the planetary nebula PN G283.7-05.1 A possible post-red-giant-branch planetary nebula central star
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行星状星云 PN G283.7-05.1 后共包层双星中心星 一颗可能的后红巨星分支行星状星云中心星
DOI：
10.1051/0004-6361/202038778
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发表时间：
2020
影响因子：
6.5
通讯作者：
Jones D
中科院分区：
文献类型：
--
作者：
Jones D
我们介绍了行星状星云PN G 283.7 −05.1中后共包层中心星星系统的发现和特征。作为POPIPlaN巡天的一部分拍摄的深层图像显示，该星云可能具有类似于其他后共包络行星状星云的双极形态。同时光和径向速度曲线模型显示，新发现的双星系统包括一个高度辐照的M型主序星星星，在5.9小时的轨道上有一个热的前白矮星。星云的前身质量特别低，约为0.4 M，使PN G 283.7 −05.1成为少数几个候选行星状星云之一，它是红巨星分支上一次共包层事件的产物。除了它的低质量，模型的温度，表面重力和光度都被发现是一致的，通过与模型大气和光电离建模的比较，观察到的恒星和星云光谱。然而，该星云中央星星的高温（Teff 95 kK）和高亮度与后RGB进化轨迹并不一致。
We present the discovery and characterisation of the post-common-envelope central star system in the planetary nebula PN G283.7−05.1. Deep images taken as part of the POPIPlaN survey indicate that the nebula may possess a bipolar morphology similar to other post-common-envelope planetary nebulae. Simultaneous light and radial velocity curve modelling reveals that the newly discovered binary system comprises a highly irradiatedM-type main-sequence star in a 5.9-hour orbit with a hot pre-white dwarf. The nebular progenitor is found to have a particularly low mass of around 0.4M⊙, making PN G283.7−05.1 one of only a handful of candidate planetary nebulae that is the product of a common-envelope event while still on the red giant branch. In addition to its low mass, the model temperature, surface gravity, and luminosity are all found to be consistent with the observed stellar and nebular spectra through comparison with model atmospheres and photoionisation modelling. However, the high temperature (Teff∼ 95 kK) and high luminosity of the central star of the nebula are not consistent with post-RGB evolutionary tracks.