论文标题
多环芳族烃（PAH）发射的激发：依赖于尺寸分布，电离和星光光谱和强度
Excitation of Polycyclic Aromatic Hydrocarbon (PAH) Emission: Dependence on Size Distribution, Ionization, and Starlight Spectrum and Intensity
论文作者
论文摘要
使用物理模型，我们研究了多环芳烃（PAH）发射光谱对照明星光的特征，对PAH尺寸分布以及PAH电荷分布的灵敏度。星光模型认为，从3个富含遥远脱甲虫（FUV）辐射的3个Myr-Old Starburst到M31隆起非常古老的频谱的发射范围。考虑了广泛的星光强度。研究了不同的星光光谱，研究了尘土飞扬的云层中红色的影响。对于固定的PAH丰度参数$ q _ {\ rm pah} $（PAH的总灰尘质量的比例为$ <10^3 $ c原子），PAH发射特征中出现的IR功率的一部分可能会因fuv-poor（m311 bulge）而变化，而pAH发射功能的一倍不同，而fuv-poor（fuv-poor（M31 Bulge）变化了两个因素。我们展示了$ q _ {\ rm pah} $如何从7.7 $ $ $ m的排放量来测量。高星光强度可以抑制17 $ $ m功能中的分数功率。
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. 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 $q_{\rm PAH}$ (the fraction of the total dust mass in PAHs with $<10^3$ C atoms), the fraction of the IR power appearing in the PAH emission features can vary by a factor of two as the starlight spectrum varies from FUV-poor (M31 bulge) to FUV-rich (young starburst). We show how $q_{\rm PAH}$ can be measured from the strength of the 7.7$μ$m emission. The fractional power in the 17$μ$m feature can be suppressed by high starlight intensities.
