标题： 能量粒子在NGC253中心星暴、盘和晕中的研究 显示英文标题

标题： Energetic Particles in the Central Starburst, Disc, and Halo of NGC253

摘要： 详细模拟星暴星系（SBGs）的银河盘和晕中高能电子和质子的光谱-空间分布是必要的，以便跟踪它们与磁化星际介质和辐射场的相互作用，确定它们的辐射产率，并估计它们在星系间环境中的剩余谱密度。 我们开发了一种半解析方法，基于从中心星暴区域和盘区的加速点开始的粒子传播扩散模型，计算盘和晕中的粒子光谱-空间分布，包括所有相关的相互作用模式。 我们模型的整体归一化基于之前对银河盘的建模（使用GALPROP代码），并根据NGC253中更高的恒星形成率进行调整，以及对中心星暴区域和盘区的空间分辨射电测量结果。 这些提供了确定外盘和内晕中粒子分布及其预测辐射产率的基本输入，适用于影响扩散率和能量损失的关键参数的各种值。 我们工作的结果明确表明，对星暴星系中非热辐射的定量描述必须基于整个盘中的粒子分布建模，而不仅仅是中心星暴区域。 显示英文摘要

摘要： Detailed modelling of the spectro-spatial distributions of energetic electrons and protons in galactic discs and haloes of starburst galaxies (SBGs) is needed in order to follow their interactions with the magnetized interstellar medium and radiation fields, determine their radiative yields, and for estimating their residual spectral densities in intergalactic environments. We have developed a semi-analytical approach for calculating the particle spectro-spatial distributions in the disc and halo based on a diffusion model for particle propagation from acceleration sites in the central SB and disc regions, including all their relevant interaction modes. Important overall normalization of our models is based on previous modelling of the Galactic disc (with the GALPROP code), scaled to the higher star-formations rate in NGC253, and on spatially resolved radio measurements of the central SB and disc. These provide the essential input for determining the particle distributions and their predicted radiative yields in the outer disc and inner halo for a range of values of the key parameters that affect diffusion rate and energy losses. Results of our work clearly indicate that quantitative description of non-thermal emission in SBGs has to be based on modelling of the particle distributions in the entire disc, not just the central SB region.