Excitation of Polycyclic Aromatic Hydrocarbon Emission: Dependence on Size Distribution, Ionization, and Starlight Spectrum and Intensity
Excitation of Polycyclic Aromatic Hydrocarbon Emission: Dependence on Size Distribution, Ionization, and Starlight Spectrum and Intensity
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DOI：
10.3847/1538-4357/abff51
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发表时间：
2021-08-01
影响因子：
4.9
通讯作者：
Smith, J-D T.
中科院分区：
文献类型：
--
作者：
Draine, B. T.;Li, Aigen;Smith, J-D T.
利用物理模型，研究了多环芳烃（PAH）发射光谱对星光特性、PAH粒径分布和PAH电荷分布的敏感性。星光模型考虑的范围从一个3百万年的老星暴，丰富的远紫外（FUV）辐射的排放，到非常古老的人口的M31隆起的FUV-穷人的光谱。广泛的星光强度被认为是。本文研究了不同星光光谱条件下尘埃云的红化效应。对于一个固定的多环芳烃丰度参数q（PAH）（多环芳烃在总尘埃质量中的比例，
Using physical models, we study the sensitivity of polycyclic aromatic hydrocarbon (PAH) emission spectra to the character of the illuminating starlight, to the PAH size distribution, and to the PAH charge distribution. The starlight models considered range from the emission from a 3 Myr old starburst, rich in far-ultraviolet (FUV) radiation, to the FUV-poor spectrum of the very old population of the M31 bulge. A wide range of starlight intensities is considered. The effects of reddening in dusty clouds are investigated for different starlight spectra. For a fixed PAH abundance parameter q (PAH) (the fraction of the total dust mass in PAHs with