标题： GYOTO 2.0：一种偏振相对论射线追踪代码 显示英文标题

标题： GYOTO 2.0: a polarized relativistic ray-tracing code

摘要： 极化广义相对论辐射传输在黑洞和其他致密天体附近已成为研究相对论天体物理等离子体性质的重要工具。 GRAVITY、事件视界望远镜、ALMA 或 IXPE 等仪器使得开发这样的数值框架变得非常及时。 在本文中，我们介绍了公开的射线追踪代码 Gyoto 的极化扩展，并提供了一个 Python 笔记本，以便轻松进行第一次现实计算。 该代码非常模块化，可以方便地添加特定用户需求的扩展。 它与时空无关，可用于任意致密天体。 我们通过提供测试来证明代码的有效性，并特别展示了与 ipole 代码的完美一致。 本文还旨在以教学方式以自包含的方式介绍所有相关的形式化方法。 显示英文摘要

摘要： Polarized general-relativistic radiative transfer in the vicinity of black holes and other compact objects has become a crucial tool for probing the properties of relativistic astrophysics plasmas. Instruments like GRAVITY, the Event Horizon telescope, ALMA, or IXPE make it very timely to develop such numerical frameworks. In this article, we present the polarized extension of the public ray-tracing code Gyoto, and offer a python notebook allowing to easily perform a first realistic computation. The code is very modular and allows to conveniently add extensions for the specific needs of the user. It is agnostic about the spacetime and can be used for arbitrary compact objects. We demonstrate the validity of the code by providing tests, and show in particular a perfect agreement with the ipole code. Our article also aims at pedagogically introducing all the relevant formalism in a self-contained manner.