论文标题
部分可观测时空混沌系统的无模型预测
A detailed temperature map of the archetypal protostellar shocks in L1157
论文作者
论文摘要
我们提出了敏感的$ \ rm nh_3 $（1,1） - （7,7）来自Karl G. Jansky的线图像非常大的阵列，朝着连续的冲击，这与由紧凑型固有系统L1157驱动的BlueshiftEffed流出叶有关。在投影距离为0.1 PC的范围内，我们的观察结果不仅追踪了扁平的包膜中的静态和冷气，而且还说明了发生高速射流撞击其周围介质的复杂物理和化学过程。具体而言，$ \ rm nh_3 $ ortho-para比率沿着喷气路径增强了2--2.5倍，在线路径上，线峰值和蓝光翼之间的速度抵消了高达$ \ rm 10 \ $ \ rm 10 \，km \，km \，km \，s^{ - 1} $;它还显示了与$ \ rm nh_3 $列密度的强烈空间相关性，该密度增强到$ \ rm> 10^{16} \，cm^{ - 2} $ to shock腔。通过线性分辨率为1500 au，我们从七个$ \ rm NH_3 $线的精制温度图显示了来自温暖的B0东部空腔墙（$ \ rm> 120 \，k $）的梯度到凉爽的腔B1和早期的冲击B2（$ \ \ \ \ rm <80 \，k $），表明震动热加热。
We present sensitive $\rm NH_3$ (1,1)--(7,7) line images from the Karl G. Jansky Very Large Array toward successive shocks, which are associated with the blueshifted outflow lobe driven by the compact protobinary system L1157. Within a projection distance of 0.1 pc, our observations not only trace the quiescent and cold gas in the flattened envelope but also illustrate the complex physical and chemical processes that take place where the high-velocity jet impinges on its surrounding medium. Specifically, the $\rm NH_3$ ortho-to-para ratio is enhanced by a factor of 2--2.5 along the jet path, where the velocity offset between the line peak and the blueshifted wing reaches values as high as $\rm 10\,km\,s^{-1}$; it also shows a strong spatial correlation with the $\rm NH_3$ column density, which is enhanced to $\rm >10^{16}\,cm^{-2}$ toward the shock cavities. At a linear resolution of 1500 au, our refined temperature map from the seven $\rm NH_3$ lines shows a gradient from the warm B0 eastern cavity wall ($\rm >120\,K$) to the cool cavity B1 and the earlier shock B2 ($\rm <80\,K$), indicating shock heating.
