论文标题
尘埃温度和宇宙黎明中的首次模拟星系的排放
Dust Temperature and Emission of FirstLight Simulated Galaxies at Cosmic Dawn
论文作者
论文摘要
我们通过将Polaris2用作蒙特卡洛光子传输模拟器，研究6和8的尘埃温度及其在6和8的红外模拟星系的红外发射的行为。为了计算星际介质（ISM）星系中的灰尘温度（$ t_ {dust} $），Polaris需要三个必需参数作为输入 - （1）星系的物理特性，例如恒星和尘埃的空间分布，这些分布来自第一光聚体。 （2）源自TheScrete偶极子近似代码（DDSCAT）模型的灰尘晶粒的内在特性。 （3）星形粒子的光学性质是其光谱能量分布（SED）的形式，它们是从二元种群和光谱合成（BPASS）模型中提取的。我们的模拟产生了平衡尘埃温度的3D地图以及星系的视线红外发射图。我们的结果表明，高红移对宇宙微波背景（CMB）辐射过多加热的重要性，从而导致中和远红外（M-FIR）灰尘发射增加。灰尘温度模型的不同评估与星系的光学和内在特性有关
We study the behavior of dust temperature and its infrared emission of FirstLight1 simulated galaxies at the redshift of 6 and 8, by using POLARIS2 as a Monte Carlo photon transport simulator. To calculate the dust temperature ($T_{dust}$) of the Interstellar medium (ISM) of galaxies, POLARIS requires three essential parameters as an input - (1) The physical characteristics of galaxies such as the spatial distribution of stars and dust, which are taken from FirstLight galaxies. (2) The intrinsic properties of dust grains that are derived from theDiscrete Dipole Approximation Code (DDSCAT) model. (3) The optical properties of star-particles are in the form of their spectral energy distributions (SEDs) which are extracted from the Binary Population and Spectral Synthesis (BPASS) model. Our simulations produced the 3D maps of the equilibrium dust temperature along with the sight-line infrared emission maps of galaxies. Our results show the importance of excess heating of dust by the Cosmic Microwave Background (CMB) radiations at high redshifts that results in increased Mid and Far infrared (M-FIR) dust emission. The different evaluations of dust temperature models relate diversely to the optical and intrinsic properties of galaxies
