论文标题
HH 137和HH 138的多频研究：发现新结和分子流出的双子座和顶点
Multifrequency study of HH 137 and HH 138: Discovering new knots and molecular outflows with Gemini and APEX
论文作者
论文摘要
我们提出了可能相关的两个HH对象（137和138）的多波长研究。我们使用Gemini H $ _2 $（2.12 $μ$ M）和K（2.2 $ $ M）图像，以及Apex Molecular Line观测和Spitzer Image Archives。双子座和Spitzer 4.5 $μ$ m的图像中鉴定出了几个h $ _2 $结，与HH 137的光学链相关。还报道了与光学结相关的新的冲击激发区域描述HH 138。此外，发现一个明亮的4.5 $ m $ m 0.09 PC长的弧形结构，该结构位于HH 137和HH 138之间的中途，发现与两个Spitzer I/II类物体有关，这可能是令人兴奋的恒星。这些来源几乎是与$^{12} $ CO（3-2），$^{13} $ CO（3-2），C $^{18} $ O（3-2），HCO $^{+} $（3-2）和HCN（3-2）和Hcn（3-2）$ $ $的$ o的高密度分子总团块一致。在观察到的区域上的$^{12} $ CO（3-2）发射分布揭示了三个分子流出的分子材料。其中两个（流出1和2）与HH 137和HH 138的所有光学结以及H $ _2 $和4.5 $ $ $ M $ m的冲击发射结相关。实际上，流出2显示了一个细长的$^{12} $ blue Lobe，它与所有H $ _2 $ nh 137相吻合，该hH 137以h $ _2 $ bow shock结尾。我们提出了一个简单的方案，将流出将流出连接到该地区检测到的尘埃团块。第三个可能的流出位于东北，投影到二次弱和冷尘块。
We present a multi-wavelength study of two HH objects (137 and 138) that may be associated. We use Gemini H$_2$ (2.12 $μ$m) and K (2.2 $μ$m) images, as well as APEX molecular line observations and Spitzer image archives. Several H$_2$ knots, linked to the optical chain of knots of HH 137, are identified in the Gemini and Spitzer 4.5 $μ$m images. New shock excited regions related to the optical knots delineating HH 138 are also reported. In addition, a bright 4.5 $μ$m 0.09 pc-long arc-shaped structure, roughly located mid-way between HH 137 and HH 138, is found to be associated with two Spitzer Class I/II objects, which are likely to be the exciting stars. These sources are almost coincident with a high-density molecular clump detected in $^{12}$CO(3-2), $^{13}$CO(3-2), C$^{18}$O(3-2), HCO$^{+}$(3-2) and HCN(3-2) molecular lines with an LTE mass of 36 M$_{\odot}$. The $^{12}$CO(3-2) emission distribution over the observed region reveals molecular material underlying three molecular outflows. Two of them (outflows 1 and 2) are linked to all optical knots of HH 137 and HH 138 and to the H$_2$ and 4.5 $μ$m shock emission knots. In fact, the outflow 2 shows an elongated $^{12}$CO blue lobe that coincides with all the H$_2$ knots of HH 137 which end at a terminal H$_2$ bow shock. We propose a simple scenario that connects the outflows to the dust clumps detected in the region. A third possible outflow is located to the north-east projected towards a secondary weak and cold dust clump.
