标题： 马格里特，一种用于光谱线辐射传输的现代软件库 显示英文标题

标题： Magritte, a modern software library for spectral line radiative transfer

摘要： 光谱线观测是远程探测宇宙中物理和化学条件不可或缺的工具。 对其行为进行建模是一个计算挑战，需要专门的软件。 在本文中，我们介绍了Magritte的第一个长期稳定的版本，这是一个用于线辐射传输的开源软件库。 首先，我们通过两个应用来证明其必要性。 然后，我们介绍了整体设计策略和应用程序/程序员接口（API）。 最后，我们展示了对之前版本的三个关键改进：（1）一种改进的重新网格化算法，以高效地粗化模型的空间离散化；（2）一种Ng加速的变体，这是一种用于非LTE线传输的流行收敛加速方法；以及（3）在存在大速度梯度的情况下，对线光学深度的半解析近似。 显示英文摘要

摘要： Spectral line observations are an indispensable tool to remotely probe the physical and chemical conditions throughout the universe. Modelling their behaviour is a computational challenge that requires dedicated software. In this paper, we present the first long-term stable release of Magritte, an open-source software library for line radiative transfer. First, we establish its necessity with two applications. Then, we introduce the overall design strategy and the application/programmer interface (API). Finally, we present three key improvements over previous versions: (1) an improved re-meshing algorithm to efficiently coarsen the spatial discretisation of a model; (2) a variation on Ng-acceleration, a popular acceleration-of-convergence method for non-LTE line transfer; and, (3) a semi-analytic approximation for line optical depths in the presence of large velocity gradients.