C- shock waves分子谱线的演化
On the evolution of the molecular line profiles induced by the propagation of C-shock waves
摘要：
我们提出的预期变化的分子线发射所产生的材料最近受到C-冲击（冲击前兆）的第一个结果。我们的参数模型的结构的C-冲击波已耦合的辐射转移代码计算的分子激发和线轮廓的冲击示踪剂，如SiO，和离子和中性分子，如H13 CO+和HN 13 C，作为冲击波传播通过未扰动介质。我们的研究结果表明，所产生的SiO发射的早期阶段的磁性前体通常有非常窄的线轮廓轻微移动的速度相对于周围的云。这种狭窄的发射产生在该区域中的离子流体的大部分已经滑向更大的速度在前体中观察到年轻的L1448-mm流出。这有力地表明，在年轻的冲击窄SiO发射和离子增强的检测，是由C-冲击的磁性前兆。此外，我们的模型表明，观察到的不同的速度分量对这个外流可以解释的共存不同的冲击在不同的演化阶段，在同一束的单盘观测。
英文摘要：
We present the first results of the expected variations of the molecular line emission arising from material recently affected by C-shocks (shock precursors). Our parametric model of the structure of C-shocks has been coupled with a radiative transfer code to calculate the molecular excitation and line profiles of shock tracers such as SiO, and of ion and neutral molecules such as H13CO+ and HN13C, as the shock propagates through the unperturbed medium. Our results show that the SiO emission arising from the early stage of the magnetic precursor typically has very narrow line profiles slightly shifted in velocity with respect to the ambient cloud. This narrow emission is generated in the region where the bulk of the ion fluid has already slipped to larger velocities in the precursor as observed toward the young L1448-mm outflow. This strongly suggests that the detection of narrow SiO emission and of an ion enhancement in young shocks, is produced by the magnetic precursor of C-shocks. In addition, our model shows that the different velocity components observed toward this outflow can be explained by the coexistence of different shocks at different evolutionary stages, within the same beam of the single-dish observations.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
