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- W3208554400 abstract "Polycyclic Aromatic Hydrocarbons (PAHs) are carbon-based molecules resulting from the union of aromatic rings and related species, which are likely responsible for strong infrared emission features (3.3, 6.2, 7.7, 8.6, 11.3 and 12.7 microns). In this work, using a sample of 50 Seyfert galaxies (DL<100 Mpc) we compare the circumnuclear (inner kpc) PAH emission of AGN to that of a control sample of star-forming galaxies (22 luminous infrared galaxies and 30 HII galaxies), and investigate the differences between central and extended PAH emission. Using Spitzer/InfraRed Spectrograph spectral data of Seyfert and star-forming galaxies and newly developed PAH diagnostic model grids, derived from theoretical spectra, we compare the predicted and observed PAH ratios. We find that star-forming galaxies and AGN-dominated systems are located in different regions of the PAH diagnostic diagrams. This suggests that not only are the size and charge of the PAH molecules different, but also the nature and hardness of the radiation field that excite them. We find tentative evidence that PAH ratios in AGN-dominated systems are consistent with emission from larger PAH molecules (Nc>300-400) as well as neutral species. By subtracting the spectrum of the central source from the total, we compare the PAH emission in the central vs extended region of a small sample of AGN. In contrast to the findings for the central regions of AGN-dominated systems, the PAH ratios measured in the extended regions of both type 1 and type 2 Seyfert galaxies can be explained assuming similar PAH molecular size distribution and ionized fractions of molecules to those seen in central regions of star-forming galaxies (100<Nc<300)." @default.
- W3208554400 created "2021-11-08" @default.
- W3208554400 creator A5016312996 @default.
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- W3208554400 creator A5069624162 @default.
- W3208554400 creator A5085782648 @default.
- W3208554400 date "2021-10-29" @default.
- W3208554400 modified "2023-10-16" @default.
- W3208554400 title "Polycyclic aromatic hydrocarbons in Seyfert and star-forming galaxies" @default.
- W3208554400 cites W1495549697 @default.
- W3208554400 cites W1599271831 @default.
- W3208554400 cites W1612012582 @default.
- W3208554400 cites W162844011 @default.
- W3208554400 cites W1831727741 @default.
- W3208554400 cites W1968043723 @default.
- W3208554400 cites W1970045950 @default.
- W3208554400 cites W1971210827 @default.
- W3208554400 cites W1978573215 @default.
- W3208554400 cites W1979519025 @default.
- W3208554400 cites W1982259312 @default.
- W3208554400 cites W1983901395 @default.
- W3208554400 cites W1984375310 @default.
- W3208554400 cites W1991449385 @default.
- W3208554400 cites W1993718469 @default.
- W3208554400 cites W1994529848 @default.
- W3208554400 cites W1994620183 @default.
- W3208554400 cites W1999403483 @default.
- W3208554400 cites W2003637061 @default.
- W3208554400 cites W2005083841 @default.
- W3208554400 cites W2016541935 @default.
- W3208554400 cites W2017683384 @default.
- W3208554400 cites W2018300021 @default.
- W3208554400 cites W2018858432 @default.
- W3208554400 cites W2021069744 @default.
- W3208554400 cites W2022142073 @default.
- W3208554400 cites W2022862485 @default.
- W3208554400 cites W2023362478 @default.
- W3208554400 cites W2026082409 @default.
- W3208554400 cites W2035345792 @default.
- W3208554400 cites W2035945931 @default.
- W3208554400 cites W2038755421 @default.
- W3208554400 cites W2040703087 @default.
- W3208554400 cites W2047973283 @default.
- W3208554400 cites W2048274049 @default.
- W3208554400 cites W2051997064 @default.
- W3208554400 cites W2052660362 @default.
- W3208554400 cites W2052937506 @default.
- W3208554400 cites W2053171521 @default.
- W3208554400 cites W2054157795 @default.
- W3208554400 cites W2056760934 @default.
- W3208554400 cites W2059215206 @default.
- W3208554400 cites W2061891588 @default.
- W3208554400 cites W2062215462 @default.
- W3208554400 cites W2069847092 @default.
- W3208554400 cites W2070258187 @default.
- W3208554400 cites W2073605692 @default.
- W3208554400 cites W2073768640 @default.
- W3208554400 cites W2074408355 @default.
- W3208554400 cites W2082322112 @default.
- W3208554400 cites W2083592425 @default.
- W3208554400 cites W2083620124 @default.
- W3208554400 cites W2087394131 @default.
- W3208554400 cites W2093601574 @default.
- W3208554400 cites W2104616690 @default.
- W3208554400 cites W2113740917 @default.
- W3208554400 cites W2121951232 @default.
- W3208554400 cites W2124999166 @default.
- W3208554400 cites W2125631609 @default.
- W3208554400 cites W2125769353 @default.
- W3208554400 cites W2126050016 @default.
- W3208554400 cites W2128517068 @default.
- W3208554400 cites W2137064512 @default.
- W3208554400 cites W2139732919 @default.
- W3208554400 cites W2141652126 @default.
- W3208554400 cites W2144661611 @default.
- W3208554400 cites W2148804397 @default.
- W3208554400 cites W2155288520 @default.
- W3208554400 cites W2160191380 @default.
- W3208554400 cites W2163945490 @default.
- W3208554400 cites W2164126591 @default.
- W3208554400 cites W2165760757 @default.
- W3208554400 cites W2168912860 @default.
- W3208554400 cites W2171949060 @default.
- W3208554400 cites W2171963590 @default.
- W3208554400 cites W2300097710 @default.
- W3208554400 cites W249061851 @default.
- W3208554400 cites W2508112031 @default.
- W3208554400 cites W2600822636 @default.
- W3208554400 cites W2604683990 @default.
- W3208554400 cites W2625867607 @default.
- W3208554400 cites W2798524535 @default.
- W3208554400 cites W2808257271 @default.
- W3208554400 cites W2891633603 @default.
- W3208554400 cites W2902407891 @default.
- W3208554400 cites W2935486123 @default.
- W3208554400 cites W3010389677 @default.