TensorFlow流体动力学分析用于Ly-α模拟
TensorFlow Hydrodynamics Analysis for Ly-$α$ Simulations
AI总结:
THALAS利用TensorFlow实现可微流体动力学分析,用于Ly-α模拟中的光学深度场映射与暗物质密度场重建。
摘要:
我们介绍了Python程序THALAS(TensorFlow流体动力学分析用于Lyman-Alpha模拟),该程序将物质场(物质密度、温度和速度)映射到Lyα光学深度场,既在现实空间又在红移空间。与之前的Lyα代码不同,THALAS是完全可微的,使广泛的应用成为可能,用于一般流体动力学模拟和宇宙推断的分析。为了展示THALAS的能力,我们将其应用于Lyα森林反演问题:给定一个Lyα光学深度场,我们重建对应的现实空间暗物质密度场。此类应用与Lyman Alpha森林数据的宇宙学和三维光谱分析相关。
英文摘要:
We introduce the Python program THALAS (TensorFlow Hydrodynamics Analysis for Lyman-Alpha Simulations), which maps baryon fields (baryon density, temperature, and velocity) to Ly$α$ optical depth fields in both real space and redshift space. Unlike previous Ly$α$ codes, THALAS is fully differentiable, enabling a wide variety of potential applications for general analysis of hydrodynamical simulations and cosmological inference. To demonstrate THALAS's capabilities, we apply it to the Ly$α$ forest inversion problem: given a Ly$α$ optical depth field, we reconstruct the corresponding real-space dark matter density field. Such applications are relevant to both cosmological and three-dimensional tomographic analyses of Lyman Alpha forest data.
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