The relationship between the properties of PAHs and AGN activities in type-I AGNs  

作　　者：Qi-Chen Feng Jing Wang Hua-Li Li Jian-Yan Wei 

机构地区：[1]National Astronomical Observatories, Chinese Academy of Sciences [2]University of Chinese Academy of Sciences [3]Key Laboratory of Space Astronomy and Technology (NAOC, CAS)

出　　处：《Research in Astronomy and Astrophysics》2015年第5期663-672,共10页天文和天体物理学研究（英文版）

基　　金：Supported by the National Natural Science Foundation of China

摘　　要：In order to explore the relationship between properties of Polycyclic Aromatic Hydrocarbons （PAHs） and AGN activities in Type-I AGNs, we compiled a sample of 47 Type-I AGNs with measured PAH 11.3 μm and 7.7 μm emission lines. The PAH emission and optical properties of these AGNs are taken from the literature. It is found that the equivalent width （EW） of 11.3 μm emission from PAHs shows a weak correlation with the ratio of the EWs of the FelI complex between λ4434 and A4684 to H/3 （RFe）. The PAH 11.3/7.7 ratio is correlated with various elements defined by the first eigenvector space, which are RFe, [OIII]A5007 luminosity and H/3 asymmetry. These correlations infer that AGNs with high RFe, weak [OIII] emission and a strong H/3 blue-wing are likely to have low PAH ionization, and hence a larger amount of neutral PAHs.In order to explore the relationship between properties of Polycyclic Aromatic Hydrocarbons （PAHs） and AGN activities in Type-I AGNs, we compiled a sample of 47 Type-I AGNs with measured PAH 11.3 μm and 7.7 μm emission lines. The PAH emission and optical properties of these AGNs are taken from the literature. It is found that the equivalent width （EW） of 11.3 μm emission from PAHs shows a weak correlation with the ratio of the EWs of the FelI complex between λ4434 and A4684 to H/3 （RFe）. The PAH 11.3/7.7 ratio is correlated with various elements defined by the first eigenvector space, which are RFe, [OIII]A5007 luminosity and H/3 asymmetry. These correlations infer that AGNs with high RFe, weak [OIII] emission and a strong H/3 blue-wing are likely to have low PAH ionization, and hence a larger amount of neutral PAHs.

关 键 词：infrared ISM -- quasars emission lines -- galaxies active -- galaxies evolution -- methods statistical 

分 类 号：P157.6[天文地球—天文学] X132[环境科学与工程—环境科学]