论文标题
红色是麦哲伦云中的星星？
Red Be stars in the Magellanic Clouds?
论文作者
论文摘要
我们重新审视了BE恒星候选者对麦哲伦云的主题，这是作者以前使用SPM4适当动作研究的。我们分别获得2357和994 LMC和SMC的GAIA DR2视差和适当的运动。如我们先前的工作中得出的那样，视差和适当的动作与颜色V-I很容易揭示出红色银河污染物前景的存在，但是这次我们确实发现有几个红色的恒星候选者与真正的麦哲伦物体一致。根据其视差和适当的动作的分布，对每种麦哲伦云的会员评估都是为每个候选者进行的。从光谱镜确认为恒星的已发表目录的汇编中，我们发现其中40（LMC）和64（SMC）是候选者，实际上是恒星。大约70％的BE恒星候选者Gaia DR2星体数据获得了近红外IRSF JHK的幅度。中红外的Sage IRAC 3.6、4.5、5.8和8.0 $ $ $ m m的大小也获得了约85％的幅度。 6 LMC和7 SMC确认是恒星显示的光学，接近或中红外的颜色比通常用于经典恒星所测量的恒星。几个BE候选者遵循那些红色预期的颜色分布，表明存在更红色的麦芽岩是恒星。
We revisit the subject of Be star candidates towards the Magellanic Clouds, previously studied by the authors using SPM4 proper motions. We obtain GAIA DR2 parallaxes and proper motions for 2357 and 994 LMC and SMC Be candidates, respectively. Parallaxes and proper motions vs. color V-I easily reveal the presence of the redder galactic contaminant foreground, as concluded in our previous work, but this time we do find a few red Be stars candidates consistent with being true Magellanic objects. A membership assessment to each Magellanic Cloud is done for each Be candidate, based on the distribution of their parallaxes and proper motions. From a compilation of published catalogues of spectroscopically confirmed Be stars, we found that 40 (LMC) and 64 (SMC) of these Be candidates, are in fact Be stars. Near infrared IRSF JHKs magnitudes were obtained for about 70% the Be stars candidates with GAIA DR2 astrometric data. Mid-infrared SAGE IRAC 3.6, 4.5, 5.8 and 8.0 $μ$m magnitudes were obtained for about 85% as well. 6 LMC and 7 SMC confirmed Be stars show optical, near- or mid-infrared colours redder than what has been typically measured for Classical Be stars. Several of the Be candidates follow those redder-than-expected colours distributions suggesting the existence of more red Magellanic Be stars.
