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.
SPECULATE: A synthetic spectral library, emulator and fitting package for accretion disc winds -- Infrastructure and application to CVs
University of Southampton（南安普顿大学）；University of Cambridge（剑桥大学）；University of Oxford（牛津大学）；Space Telescope Science Institute（太空望远镜科学研究所）；Eureka Scientific Inc（尤里卡科学公司）；Queen’s University Belfast（贝尔法斯特女王大学）；ComplyAdvantage；Univ. Grenoble Alpes CNRS IPAG（格勒诺布尔阿尔卑斯大学CNRS IPAG）
