Decoupling the AGN outflow and star-forming disk kinematics in the nuclear region of NGC 7582 with JWST NIRSpec and MIRI/MRS
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| Format: | Preprint |
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2026
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| author | Veenema, Oscar Thatte, Niranjan Rigopoulou, Dimitra García-Bernete, Ismael Alonso-Herrero, Almudena Pereira-Santaella, Miguel Audibert, Anelise Bellocchi, Enrica Bunker, Andrew J. Campbell, Steph Combes, Francoise Davies, Ric I. Donnan, Fergus R. García-Burillo, Santiago Martin, Omaira Gonzalez Muñoz, Laura Hermosa Hicks, Erin K. S. Hoenig, Sebastian F. Labiano, Alvaro Levenson, Nancy A. Packham, Chris Almeida, Cristina Ramos Ricci, Claudio Riffel, Rogemar A. Rosario, David Shimizu, Taro Zhang, Lulu |
| author_facet | Veenema, Oscar Thatte, Niranjan Rigopoulou, Dimitra García-Bernete, Ismael Alonso-Herrero, Almudena Pereira-Santaella, Miguel Audibert, Anelise Bellocchi, Enrica Bunker, Andrew J. Campbell, Steph Combes, Francoise Davies, Ric I. Donnan, Fergus R. García-Burillo, Santiago Martin, Omaira Gonzalez Muñoz, Laura Hermosa Hicks, Erin K. S. Hoenig, Sebastian F. Labiano, Alvaro Levenson, Nancy A. Packham, Chris Almeida, Cristina Ramos Ricci, Claudio Riffel, Rogemar A. Rosario, David Shimizu, Taro Zhang, Lulu |
| contents | We present a detailed study of the inner regions of NGC~7582, a nearby Seyfert~2 galaxy, from the Galaxy Activity, Torus and Outflow Survey (GATOS). The galaxy hosts a circumnuclear star-forming disk and an AGN-driven biconical ionised outflow. Using JWST NIRSpec and MIRI/MRS integral-field spectroscopy, we analyse ionic emission lines spanning a wide range of ionisation potentials (IPs, $\sim 8$--$126$ eV). Gaussian line-profile fitting reveals kinematic stratification: low-IP species ($\lesssim 20$ eV; e.g., [Fe II], [Ar II], [Ne II]) trace ordered disk rotation with PA $\sim -12 \pm 3^\circ$, while high-IP species ($\gtrsim 35$ eV; e.g., [O IV], [Mg IV], [Ne V]) follow the outflow with PA $\sim 54 \pm 10^\circ$. Outflowing gas exhibits systematically higher velocity dispersions ($119 \pm 13$ km/s) than the disk ($78 \pm 11$ km/s), consistent with turbulent or bulk motions. Intermediate-IP lines, [S III], [Ar III], and [Ne III], show contributions from both components, with the outflow characterised by higher dispersion, lower amplitude, and higher velocities in double-Gaussian fits. For these lines, a thin inclined disk plus one-dimensional outflow model enables robust separation and quantification of the disk and outflow velocity fields. The outflow is consistent with a hollow bicone capable of accelerating gas beyond the local escape velocity, implying most material is unlikely to be re-accreted. The ionisation cone opening angle shows no dependence on IP, indicating the AGN torus polar regions are largely unobscured. Our study provides new insights into AGN-driven outflows and circumnuclear disk dynamics, offering a framework to disentangle overlapping ISM kinematics in nearby active galaxies. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_24892 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Decoupling the AGN outflow and star-forming disk kinematics in the nuclear region of NGC 7582 with JWST NIRSpec and MIRI/MRS Veenema, Oscar Thatte, Niranjan Rigopoulou, Dimitra García-Bernete, Ismael Alonso-Herrero, Almudena Pereira-Santaella, Miguel Audibert, Anelise Bellocchi, Enrica Bunker, Andrew J. Campbell, Steph Combes, Francoise Davies, Ric I. Donnan, Fergus R. García-Burillo, Santiago Martin, Omaira Gonzalez Muñoz, Laura Hermosa Hicks, Erin K. S. Hoenig, Sebastian F. Labiano, Alvaro Levenson, Nancy A. Packham, Chris Almeida, Cristina Ramos Ricci, Claudio Riffel, Rogemar A. Rosario, David Shimizu, Taro Zhang, Lulu Astrophysics of Galaxies We present a detailed study of the inner regions of NGC~7582, a nearby Seyfert~2 galaxy, from the Galaxy Activity, Torus and Outflow Survey (GATOS). The galaxy hosts a circumnuclear star-forming disk and an AGN-driven biconical ionised outflow. Using JWST NIRSpec and MIRI/MRS integral-field spectroscopy, we analyse ionic emission lines spanning a wide range of ionisation potentials (IPs, $\sim 8$--$126$ eV). Gaussian line-profile fitting reveals kinematic stratification: low-IP species ($\lesssim 20$ eV; e.g., [Fe II], [Ar II], [Ne II]) trace ordered disk rotation with PA $\sim -12 \pm 3^\circ$, while high-IP species ($\gtrsim 35$ eV; e.g., [O IV], [Mg IV], [Ne V]) follow the outflow with PA $\sim 54 \pm 10^\circ$. Outflowing gas exhibits systematically higher velocity dispersions ($119 \pm 13$ km/s) than the disk ($78 \pm 11$ km/s), consistent with turbulent or bulk motions. Intermediate-IP lines, [S III], [Ar III], and [Ne III], show contributions from both components, with the outflow characterised by higher dispersion, lower amplitude, and higher velocities in double-Gaussian fits. For these lines, a thin inclined disk plus one-dimensional outflow model enables robust separation and quantification of the disk and outflow velocity fields. The outflow is consistent with a hollow bicone capable of accelerating gas beyond the local escape velocity, implying most material is unlikely to be re-accreted. The ionisation cone opening angle shows no dependence on IP, indicating the AGN torus polar regions are largely unobscured. Our study provides new insights into AGN-driven outflows and circumnuclear disk dynamics, offering a framework to disentangle overlapping ISM kinematics in nearby active galaxies. |
| title | Decoupling the AGN outflow and star-forming disk kinematics in the nuclear region of NGC 7582 with JWST NIRSpec and MIRI/MRS |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2604.24892 |