论文标题
深色小球DC 314.8-5.1的多波长研究：点源识别和扩散发射表征
Multiwavelength Study of Dark Globule DC 314.8-5.1: Point Source Identification and Diffuse Emission Characterization
论文作者
论文摘要
我们使用来自Gaia光学的数据，2个Mass近红外的数据和明智的中边界调查，使用Spitzer Space TeleScope和Swift-XRT Telescope（XRT）获得的专用成像，对深色球DC \，314.8--5.1的多波长DC \，314.8--5.1进行了分析。主要目标是确定可能与球体相关的可能的前序列序列星（PMS）和年轻的恒星对象（YSO）。为此，我们研究了云边界内所有点源的红外颜色。在使用非固有光谱的来源删除后，我们研究了YSO候选人的Gaia视差，发现没有一个与DC \，314.8--5.1在物理上相关。此外，我们搜索了带有Swift-XRT的前序列星的X射线排放，发现No 0.5---10 \，KeV排放到亮度级别$ \ lyseSim 10^{31} $ erg \ \，s $^{ - 1} $，典型的pms pms，具有质量\，$ \，$ \ ge ge 2 m_ \ odot $。因此，我们的详细检查支持了一个非常年轻的``前核心核心''的进化阶段。基于档案planck和IRAS数据，我们还确定了热尘的存在，温度$ \ gtrsim 100 $ \，K，除了以相关反射星云为单位的14 \ k，k处的主要灰尘成分。
We present an analysis of multi-wavelength observations of the dark globule DC\,314.8--5.1, using data from the Gaia optical, 2MASS near-infrared, and WISE mid-infrared surveys, dedicated imaging with the Spitzer Space Telescope, and X-ray data obtained with the Swift-XRT Telescope (XRT). The main goal was to identify possible pre-main sequence stars (PMSs) and young stellar objects (YSOs) associated with the globule. For this, we studied the infrared colors of all point sources within the boundaries of the cloud. After removing sources with non-stellar spectra, we investigated the Gaia parallaxes for the YSO candidates, and found that none are physically related to DC\,314.8--5.1. In addition, we searched for X-ray emission from pre-main sequence stars with Swift-XRT, and found no 0.5--10\,keV emission down to a luminosity level $\lesssim 10^{31}$erg\,s$^{-1}$, typical of a PMS with mass\,$\ge 2 M_\odot$. Our detailed inspection therefore supports a very young, ``pre-stellar core'' evolutionary stage for the cloud. Based on archival Planck and IRAS data, we moreover identify the presence of hot dust, with temperatures $\gtrsim 100$\,K, in addition to the dominant dust component at 14\,K, originating with the associated reflection nebula.
