论文标题
辣：内层中间平面的Spitzer/IRAC候选YSO目录
SPICY: The Spitzer/IRAC Candidate YSO Catalog for the Inner Galactic Midplane
论文作者
论文摘要
我们根据对L〜255度和110度之间的银河中部平面的调查，提出约120,000个Spitzer/IRAC候选恒星物体（YSO），包括瞥见I，II，II和3D，Vela-Carina，cygnus X和Smog Sunveys（613平方）（613 SquareEs），靠近in-In-In-In-In-In-In-In-In-In-In-In-In-In-In-In-In-In-In-In-In-In-In-In-In-In-In-In-In-In-In-In-In-ings Catalog。我们采用了一种分类方案，该方案使用量身定制的统计学习方法的灵活性并策划了YSO数据集，以充分利用IRAC在中红外〜3-9微米范围内的空间分辨率和灵敏度。多波长的颜色/幅度分布提供了有关分类器如何将YSO与其他红色IRAC源分开的直觉，并验证样品与对磁盘/包络的前序列前序列的期望一致。我们还确定了与具有强硅酸盐吸收或多环芳芳烃发射物体相关的IRAC颜色空间区域。空间分布和可变性属性有助于证实样本的年轻性质。大多数候选人都在具有中期墨水中的中期云层的地区，与恒星形成云有关，但其他候选人出现在田野中。使用GAIA DR2距离估计值，我们发现与当地臂，射手座 - 卡琳娜臂和史卡达龙组相关的YSO候选者组。 Zwicky瞬态设施可见的候选YSO倾向于比随机选择的相同幅度的田间星的变异性幅度更高，其中许多具有YSO的光曲线形态特征的高振幅变量。鉴于没有目前或计划的工具在拥有其广阔的地图功能的同时，没有明显超过IRAC的空间分辨率，因此，基于Spitzer的目录（例如我们的）将仍然是在不久的将来的银河中部平面中型YSO的主要资源。
We present ~120,000 Spitzer/IRAC candidate young stellar objects (YSOs) based on surveys of the Galactic midplane between l~255 deg and 110 deg, including the GLIMPSE I, II, and 3D, Vela-Carina, Cygnus X, and SMOG surveys (613 square degrees), augmented by near-infrared catalogs. We employed a classification scheme that uses the flexibility of a tailored statistical learning method and curated YSO datasets to take full advantage of IRAC's spatial resolution and sensitivity in the mid-infrared ~3-9 micron range. Multi-wavelength color/magnitude distributions provide intuition about how the classifier separates YSOs from other red IRAC sources and validate that the sample is consistent with expectations for disk/envelope-bearing pre-main-sequence stars. We also identify areas of IRAC color space associated with objects with strong silicate absorption or polycyclic aromatic hydrocarbon emission. Spatial distributions and variability properties help corroborate the youthful nature of our sample. Most of the candidates are in regions with mid-IR nebulosity, associated with star-forming clouds, but others appear distributed in the field. Using Gaia DR2 distance estimates, we find groups of YSO candidates associated with the Local Arm, the Sagittarius-Carina Arm, and the Scutum-Centaurus Arm. Candidate YSOs visible to the Zwicky Transient Facility tend to exhibit higher variability amplitudes than randomly selected field stars of the same magnitude, with many high-amplitude variables having light-curve morphologies characteristic of YSOs. Given that no current or planned instruments will significantly exceed IRAC's spatial resolution while possessing its wide-area mapping capabilities, Spitzer-based catalogs such as ours will remain the main resources for mid-infrared YSOs in the Galactic midplane for the near future.
