GATOS XIV: The first direct kinematic evidence of dusty outflows from AGN via PAH kinematics of local Seyfert galaxies with JWST
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ID: 318286
2026
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Abstract
Abstract We present the first spatially resolved kinematic evidence for dust in the outflows of Active Galactic Nuclei (AGN). We utilise observations from JWST with NIRSpec IFU and MIRI MRS data of 10 local Seyferts and use Principal Component Analysis (PCA) tomography to extract the kinematics of Polycyclic Aromatic Hydrocarbon (PAH) features. PAHs comprise the smallest carbonaceous dust molecules in the Interstellar Medium (ISM), and produce emission features in the infrared providing the potential to measure kinematics. This is however challenging due to their broad shapes and variations in their intrinsic profile, prompting the need for techniques such as PCA tomography. We find that the velocity of the PAHs is similar to the molecular gas as traced by the rotational transitions of H2, where for NGC 5728 and NGC 7582, both disk and outflow are present. We detect the outflow in the kinematics of large and neutral PAHs, namely the 11.3 μm and 17 μm PAH features, where after subtracting the disk, the velocity field matches that of high-ionisation potential lines such as [NeVI] (7.65 μm, IP = 158 eV). Finally, we fail to detect kinematics of the 6.2 μm PAH due to an altered intrinsic profile while the the 3.3 μm PAH kinematics purely trace the circumnuclear disk. This suggests the PAHs in the outflow are more neutral and larger than in star-forming regions, consistent with PAH band ratios in previous studies of AGN.
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| Authors | Fergus R. Donnan, I. García-Bernete, D. Rigopoulou, Almudena Alonso-Herrero, A. Audibert, E. Bellocchi, Andrew J. Bunker, Steph Campbell, Françoise Combes, R. Davies, Tanio Díaz-Santos, J. A. Fernández-Ontiveros, P. Gandhi, Santiago García-Burillo, Omaira González-Martín, Erin K S Hicks, Laura Hermosa Muñoz, S. Hoenig, Masatoshi Imanishi, Á. Labiano, Nancy A Levenson, Miguel Pereira-Santaella, Cristina Ramos Almeida, C Ricci, Rogemar A. Riffel, Daniel Rouan, David Rosario, Karin Sandstrom, Thomas Shimizu, Marko Stalevski, Niranjan Thatte, Oscar Veenema, Lulu Zhang |
| Journal | monthly notices of the royal astronomical society |
| Year | 2026 |
| DOI |
10.1093/mnras/stag1181
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| URL | |
| Keywords | Keywords not found |
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