论文标题
明智的绿色物体（WGO）：整个银河平面中的巨大恒星候选者
WISE Green Objects (WGOs): the massive star candidates in the whole Galactic Plane ($\mid b \mid <2^\circ$)
论文作者
论文摘要
巨大的年轻恒星物体（迈索斯）在恒星形成中起着至关重要的作用。鉴于先前根据扩展结构确定了迈索斯，并且对它们的观察数据有限，因此筛选显示绿色特征的宽场红外调查探索器（WISE）对象（对于4.6 $ $ $ m m频段作为三色复合图像中的绿色通道的常见编码）将产生更多的MySO候选人。使用整个银河平面中的明智图像（$ 0^\ Circ <l <360^\ Circ $和$ \ Mid B \ Mid B \ Mid <2^\ Circ $），我们确定了具有强大排放的来源，以4.6 $ $ m m频段，然后根据形态特征将它们分为三组。我们提出了2135个明智的绿色物体（WGO）的目录。 264 WGO具有扩展结构。 1366 WGO显示紧凑的绿色功能，但没有扩展结构。 505 WGO既没有扩展结构也没有绿色功能，但是在4.6 $ $ m m的强度在数值上至少是3.4 $ $ m的4.5倍。根据对WGO的坐标的分析，我们发现WGO主要分布在$ \中间<60^\ Circ $中，与巨大的分子云的位置相吻合，在$ \ MID L \ MID L \ MID> 60^\ CIRC $中。与各种MASER的匹配结果表明，这三组WGO处于不同的进化阶段。在与已发布的YSO调查目录进行了交叉匹配的WGO之后，我们推断出$ \ sim $ 50％的WGO是新发现的YSO的样本。此外，根据通过光谱能量分布拟合估算的物理参数，1260个WGO与HI-GAL源相关，其中231个被归类为可靠的迈索斯，而172则作为候选迈索斯。
Massive young stellar objects (MYSOs) play a crucial role in star formation. Given that MYSOs were previously identified based on the extended structure and the observational data for them is limited, screening the Wide-field Infrared Survey Explorer (WISE) objects showing green features (for the common coding of the 4.6 $μ$m band as green channel in three-color composite WISE images) will yield more MYSO candidates. Using WISE images in the whole Galactic Plane ($ 0^\circ<l<360^\circ $ and $\mid b \mid <2^\circ$), we identified sources with strong emissions at 4.6 $μ$m band, then according to morphological features divided them into three groups. We present a catalog of 2135 WISE Green Objects (WGOs). 264 WGOs have an extended structure. 1366 WGOs show compact green feature but without extended structure. 505 WGOs have neither extended structure nor green feature, but the intensity at 4.6 $μ$m is numerically at least 4.5 times that of 3.4 $μ$m. According to the analysis of the coordinates of WGOs, we find WGOs are mainly distributed in $\mid l \mid< 60^\circ$, coincident with the position of the giant molecular clouds in $\mid l \mid> 60^\circ$. Matching results with various masers show that those three groups of WGOs are at different evolutionary stages. After cross-matching WGOs with published YSO survey catalogs, we infer that $\sim$50% of WGOs are samples of newly discovered YSOs. In addition, 1260 WGOs are associated with Hi-GAL sources, according to physical parameters estimated by spectral energy distribution fitting, of which 231 are classified as robust MYSOs and 172 as candidate MYSOs.
