论文标题
Lyman-Alpha辐射转移：Lyman-Alpha发射星系的建模光谱和表面亮度轮廓在z = 3-6
Lyman-alpha radiative transfer: Modeling spectrum and surface brightness profile of Lyman-alpha emitting galaxies at z=3-6
论文作者
论文摘要
我们执行Lyman-Alpha辐射转移计算，用于在高红移处重现星形星系的Lyman-Alpha特性。我们将银河系模拟为光环，其中用指数函数描述了Lyman-Alpha和H I Plus dust介质的密度分布。我们还考虑了介质的流出，该介质代表重力电位中的动量驱动风。我们成功地使用了lyman-alpha散射的这种流出的光环模型，成功地复制了Z = 3-6时Z = 3-6的八个星形星系的光谱和表面亮度曲线。这些星系的最佳拟合模型参数（即，流速度和光学深度的流出速度和光学深度）与其他研究一致。我们检查了单个模型参数和输入频谱对新兴频谱和表面亮度曲线的影响。还提出了对观察物之间相关性的进一步研究（即，也提出了模型参数的莱曼 - 阿尔法和莱曼 - 阿尔法光谱特征的空间范围，以及空间分辨的光谱。我们证明，频谱和表面亮度曲线的组合对培养基的模型参数提供了强大的限制，从而提供了空间/运动学分布。
We perform Lyman-alpha radiative transfer calculations for reproducing Lyman-alpha properties of star-forming galaxies at high redshifts. We model a galaxy as a halo in which the density distributions of Lyman-alpha sources and H I plus dust medium are described with exponential functions. We also consider an outflow of the medium that represents a momentum-driven wind in a gravitational potential well. We successfully reproduce both the spectra and the surface brightness profiles of eight star-forming galaxies at z =3-6 observed with MUSE using this outflowing halo model with Lyman-alpha scattering. The best-fit model parameters (i.e., the outflowing velocity and optical depth) for these galaxies are consistent with other studies. We examine the impacts of individual model parameters and input spectrum on emerging spectrum and surface brightness profile. Further investigations on correlations among observables (i.e., the spatial extent of Lyman-alpha halos and Lyman-alpha spectral features) and model parameters, and spatially resolved spectra are presented as well. We demonstrate that the combination of spectrum and surface brightness profile provides strong constraints on model parameters and thus spatial/kinematic distributions of medium.
