桥接从黑洞尺度到长期电磁辐射距离的相对论喷流：一个带有HLLC黎曼求解器的移动网格广义相对论流体力学代码
Bridging relativistic jets from black hole scales to long-term electromagnetic radiation distances: A moving-mesh general relativistic hydrodynamics code with the HLLC Riemann solver
AI总结：
提出了广义相对论移动网格框架JET，结合HLLC黎曼求解器，首次实现相对论喷流从黑洞尺度诞生到牛顿耗散阶段的全过程自洽模拟。
摘要：
相对论喷流伴随大质量恒星坍缩、致密天体合并或活动星系核中的气体吸积而产生。它们携带中心引擎的信息并产生电磁辐射。此前没有自洽的模拟能够追踪这些喷流从黑洞尺度的诞生一直到牛顿耗散阶段，使得通过天文观测推断中心引擎性质具有不确定性。我们提出了广义相对论移动网格框架，以实现喷流模拟在空间和时间上的连续性。我们为移动网格相对论流体力学代码JET实现了广义相对论扩展，并开发了四元组形式以在广义相对论移动网格代码中使用Harten-Lax-van Leer Contact (HLLC) 黎曼求解器。新框架能够追踪相对论喷流从强引力束缚的中心区域一直到喷流耗散距离的径向运动。
英文摘要：
Relativistic jets accompany the collapse of massive stars, the merger of compact objects, or the accretion of gas in active galactic nuclei. They carry information about the central engine and generate electromagnetic radiation. No self-consistent simulations have been able to follow these jets from their birth at the black hole scale to the Newtonian dissipation phase, making the inference of central engine property through astronomical observations undetermined. We present the general relativistic moving-mesh framework to achieve the continuity of jet simulations throughout space and time. We implement the general relativistic extension for the moving-mesh relativistic hydrodynamic code, JET, and develop a tetrad formulation to utilize the Harten-Lax-van Leer Contact (HLLC) Riemann solver in the general relativistic moving-mesh code. The new framework is able to trace the radial movement of relativistic jets from central regions where strong gravity holds all the way to distances of jet dissipation.
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