论文标题
湍流对Lyman-Alpha散射的影响
Influence of turbulence on Lyman-alpha scattering
论文作者
论文摘要
我们开发了一个蒙特卡洛辐射转移代码，以研究有限相关长度的湍流对通过中性原子氢气传播的Lyman-Alpha（Ly $α$）光子散射的影响。我们研究了有效的平均自由路径，新兴频谱以及在存在湍流的情况下会发生变化的$α$光子的平均散射数量。我们发现相关长度是一个重要且敏感的参数，它对$α$辐射传递的物理相关特性有影响。特别是，通过数量级，它可以显着减少平均$ ly $α$光子在逃脱湍流云之前发生的散射事件数量。
We develop a Monte Carlo radiative transfer code to study the effect of turbulence with a finite correlation length on scattering of Lyman-alpha (Ly$α$) photons propagating through neutral atomic hydrogen gas. We investigate how the effective mean free path, the emergent spectrum, and the average number of scatterings that Ly$α$ photons experience change in the presence of turbulence. We find that the correlation length is an important and sensitive parameter that has an influence on physically relevant properties of Ly$α$ radiative transfer. In particular, it can significantly, by orders of magnitude, reduce the number of scattering events that the average Ly$α$ photon undergoes before it escapes the turbulent cloud.
