几何校正因子的三角扩展：在ENZO中为自适应光线跟踪增加精度的原型
Trigonometric Extension of the Geometric Correction Factor: Prototype for adding precision to adaptive ray tracing in ENZO
摘要：
在本文中，我们描述了一种方法，旨在增加精度的辐射模拟的自适应网格细化宇宙流体动力学代码ENZO。我们以\textit{ENZO+MORAY: radiation hydrodynamics adaptive mesh refinement simulations with adaptive ray tracing}（Wise and Abel 2011）中描述的几何校正因子为基础，该因子解释了立方体对射线立体角的部分覆盖。由于近似方法中的这种几何不匹配，辐射场中存在伪影。在这里，我们解决了二维扩展，它作为三维情况下的充分估计，在实践中，分层等面积等纬度像素化的球体（HEALPix）（Gorski 2005）。我们将证明几何校正因子的扩展的价值，并为将来实现ENZO以改进点源辐射的模拟奠定基础。
英文摘要：
In this paper, we describe a method designed to add precision to radiation simulations in the adaptive mesh refinement cosmological hydrodynamics code ENZO. We build upon the geometric correction factor described in \textit{ENZO+MORAY: radiation hydrodynamics adaptive mesh refinement simulations with adaptive ray tracing} (Wise and Abel 2011) which accounts for partial coverage of a ray's solid angle with a cube. Because of this geometric mismatch in the methods to approximate this, there are artifacts in the radiation field. Here, we address the two-dimensional extension, which acts as a sufficient estimate of the three-dimensional case and, in practice, the Hierarchical Equal Area isoLatitude Pixelization of the sphere (HEALPix) (Gorski 2005). We will demonstrate the value of an extension to the geometric correction factor and lay the groundwork for a future implementation to ENZO to improve simulations of radiation from point sources.
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