论文标题
附近恒星盖亚目录中微弱的蓝色白色矮人的星体和光度验证
Astrometric and photometric verification of faint blue white dwarfs in the Gaia catalogue of nearby stars
论文作者
论文摘要
附近恒星（GCNS）的Gaia目录将所有物体划分为$> $ 10MAS的所有物体分为GCNS选择的和GCNS拒绝的100pc样品。在完整的GCNS颜色尺度图（CMD）中的白色矮人（WD）序列下方，$ GABS> 14.7+4.7（G-RP）$，出现60个GCNS选择的微弱的蓝色白色矮人（FBWD）。但是，该CMD区域还由411 GCNS拒绝的物体填充，主要来自拥挤的银河中心和麦哲伦云。 Gentile Fusillo等人的WD目录。 （2021）仅列出47个GCN选择的，但还列出了8个GCNS拒绝对象。我确认了59个GCN选择的，但没有使用其他光学天空调查进行视觉检查和适当的运动检查中的GCN拒绝对象作为FBWD。因此，FBWD在CMD中形成一个附加分支。与完整的GCN选择的100％样品相比，FBWD具有相对较高的适当运动和切向速度。它们代表了对超级或红外物种研究的有趣目标，也可能是超级WDS。
The Gaia catalogue of nearby stars (GCNS) divided all objects with parallaxes $>$10mas into GCNS-selected and GCNS-rejected 100pc samples. Below the white dwarf (WD) sequence in the complete GCNS color-magnitude diagram (CMD), at $Gabs>14.7+4.7(G-RP)$, there appear 60 GCNS-selected faint blue white dwarfs (FBWDs). However this CMD region is also populated by 411 GCNS-rejected objects, mainly from crowded regions towards the Galactic centre and the Magellanic Clouds. The WD catalog of Gentile Fusillo et al. (2021) lists only 47 GCNS-selected but also 8 GCNS-rejected objects. I confirm 59 of the GCNS-selected but none of the GCNS-rejected objects as FBWDs from visual inspection and a proper motion check using additional optical sky surveys. Hence FBWDs form an additional branch in the CMD. Compared to the full GCNS-selected 100pc sample, FBWDs have relatively high proper motions and tangential velocities. They represent interesting targets for studies of ultracool or infrared-faint, and possibly also ultramassive WDs.
