论文标题
在Orion BN/KL区域的爆炸性弹射中建模CO彩流器
Modelling the CO streamers in the explosive ejection of Orion BN/KL region
论文作者
论文摘要
我们提供了反应性气体，轴对称模拟，以建模在Orion BN/KL中观察到的CO流媒体的高速度团块。我们考虑了15种化学物种，这是原子和分子气的冷却功能，以及通过宇宙射线加热。我们的数值模拟探索了不同的射血速度，星际中等密度配置和CO含量。使用CO密度和温度，我们计算了CO（$ j = 2 \ to1 $）的发射率，并构建了CO地图和空间分辨的线轮廓，使我们能够看到流媒体的CO发射区域并获得位置速度图以与观测值相比。我们发现，为了重现BN/KL CO流媒体和H $ _2 $手指的图像和线条曲线，我们需要首先在密集的云核心内行驶，然后进入低密度环境。
We present reactive gasdynamic, axisymmetric simulations of dense, high velocity clumps for modelling the CO streamers observed in Orion BN/KL. We have considered 15 chemical species, a cooling function for atomic and molecular gas, and heating through cosmic rays. Our numerical simulations explore different ejection velocities, interstellar medium density configurations, and CO content. Using the CO density and temperature, we have calculated the CO ($J=2\to1$) emissivity, and have built CO maps and spatially resolved line profiles, allowing us to see the CO emitting regions of the streamers and to obtain position velocity diagrams to compare with observations. We find that in order to reproduce the images and line profiles of the BN/KL CO streamers and H$_2$ fingers, we need to have clumps that first travel within a dense cloud core, and then emerge into a lower-density environment.
