论文标题
在附近的9个高质量恒星形成区域中分子流出的高敏性毫米成像
High-sensitivity millimeter imaging of molecular outflows in nine nearby high-mass star-forming regions
论文作者
论文摘要
我们提出了使用六个分子线（包括12CO/13CO/C18O/HCO+（J = 1-0）和SIO/CS（J = 2-1））的分子流出研究的研究，该研究具有准确的已知距离。这项工作基于用紫色山天文台Delingha（PMODLH）天文台的14毫米望远镜获得的高敏性观测值。流出的检测率（包括12CO，13CO，HCO+和CS）为100 \％。但是，对于所有来源，并未检测到SIO的发射。超过这些分子线的基线的3 $σ$的完整线宽度（$ΔV$）具有关系$ΔV_{\ rm ^{12} co}>ΔV_{\ rm hco ^{+rm hco ^{+}}}>ΔV_{ ΔV_{\ rm ^{18} co} $。 12CO和HCO+可用于追踪相对较高的速度流出，而13CO和CS可用于追踪相对较低的速度流出。 13CO和CS流出的动力学时间尺度比12CO和HCO+流出的时间更长。所有流出的机械亮度，质量，质量损失率和力（包括12CO，13CO，HCO+和CS）与其中央IRAS源的冲击仪相关。
We present a study of molecular outflows using six molecular lines (including 12CO/13CO/C18O/HCO+(J = 1-0) and SiO/CS(J = 2-1)) toward nine nearby high-mass star-forming regions with accurate known distances. This work is based on the high-sensitivity observations obtained with the 14-m millimeter telescope of Purple Mountain Observatory Delingha (PMODLH) observatory. The detection rate of outflows (including 12CO, 13CO, HCO+, and CS) is 100\%. However, the emission of SiO was not detected for all sources. The full line widths ($ΔV$) at 3$σ$ above the baseline of these molecular lines have the relationship $ΔV_{\rm ^{12}CO} > ΔV_{\rm HCO^{+}} > ΔV_{\rm CS} \approx ΔV_{\rm ^{13}CO} > ΔV_{\rm ^{18}CO}$. 12CO and HCO+ can be used to trace relatively high-velocity outflows, while 13CO and CS can be employed to trace relatively low-velocity outflows. The dynamical timescales of the 13CO and CS outflows are longer than those of the 12CO and HCO+ outflows. The mechanical luminosities, masses, mass-loss rates and forces of all outflows (including 12CO, 13CO, HCO+, and CS) are correlated with the bolometric luminosities of their central IRAS sources.
