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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2605.12973 |
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| _version_ | 1866917509049876480 |
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| author | Li, Ruitian Wang, Xin Liu, Daizhong Shi, Hui Pang, Yuxuan Ren, Pengfei Wang, Shengzhe Zhu, Ming Ju, Mengting Meng, Xiao-Lei Shu, Xinwen Tang, Ningyu Wang, Jing Zhang, Chuan-Peng Zhang, Hong-Xin Zhang, Le Zheng, Zheng Li, Fujia Xu, Chen Li, Sijia Yang, Yiming Zhou, Hang |
| author_facet | Li, Ruitian Wang, Xin Liu, Daizhong Shi, Hui Pang, Yuxuan Ren, Pengfei Wang, Shengzhe Zhu, Ming Ju, Mengting Meng, Xiao-Lei Shu, Xinwen Tang, Ningyu Wang, Jing Zhang, Chuan-Peng Zhang, Hong-Xin Zhang, Le Zheng, Zheng Li, Fujia Xu, Chen Li, Sijia Yang, Yiming Zhou, Hang |
| contents | Active galactic nucleus (AGN) feedback is a key ingredient in galaxy evolution, yet its impact on the cold atomic gas reservoir -- the neutral hydrogen (HI) phase -- remains poorly constrained. We present the most extensive spatially resolved HI 21-cm survey of Seyfert AGN hosts to date, based on observations with the Giant Metrewave Radio Telescope (GMRT). Our high-resolution HI maps of eight Seyfert galaxies reveal detailed kinematics and surface density distributions of their atomic gas disks. We find that AGN-host galaxies exhibit a slightly shallower HI mass-size relation than the canonical relation or the SIMBA simulation predictions; however, the measured slope remains consistent with the canonical value within $2σ$ uncertainties. This result suggests that AGN feedback does not significantly disrupt the global extent or large-scale structure of atomic gas reservoirs. To investigate the internal HI kinematics in greater detail, we perform a 3D kinematic forward modeling of the HI disk in UGC 4503. Our analysis reveals an elevated intrinsic velocity dispersion of $σ= 14.9^{+6.1}_{-3.8}$ km/s and a reduced level of rotational support, with $V/σ= 14.28_{-4.17}^{+4.97}$, compared to large-sample star-forming spirals. These kinematic signatures, together with localized residuals in the velocity field, indicate that AGN-driven outflows or jets may inject or indirectly affect the turbulence in the atomic gas disk, potentially regulating the cold gas reservoir. Future GMRT observations, combined with optical integral-field spectroscopy from MaNGA, will enable quantitative constraints on the role of AGN feedback in regulating star formation efficiency across a larger and more representative galaxy sample. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_12973 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | A Spatially Resolved HI Survey of Seyfert Galaxies: the Role of AGN Feedback in Shaping Atomic Gas Reservoirs Li, Ruitian Wang, Xin Liu, Daizhong Shi, Hui Pang, Yuxuan Ren, Pengfei Wang, Shengzhe Zhu, Ming Ju, Mengting Meng, Xiao-Lei Shu, Xinwen Tang, Ningyu Wang, Jing Zhang, Chuan-Peng Zhang, Hong-Xin Zhang, Le Zheng, Zheng Li, Fujia Xu, Chen Li, Sijia Yang, Yiming Zhou, Hang Astrophysics of Galaxies Active galactic nucleus (AGN) feedback is a key ingredient in galaxy evolution, yet its impact on the cold atomic gas reservoir -- the neutral hydrogen (HI) phase -- remains poorly constrained. We present the most extensive spatially resolved HI 21-cm survey of Seyfert AGN hosts to date, based on observations with the Giant Metrewave Radio Telescope (GMRT). Our high-resolution HI maps of eight Seyfert galaxies reveal detailed kinematics and surface density distributions of their atomic gas disks. We find that AGN-host galaxies exhibit a slightly shallower HI mass-size relation than the canonical relation or the SIMBA simulation predictions; however, the measured slope remains consistent with the canonical value within $2σ$ uncertainties. This result suggests that AGN feedback does not significantly disrupt the global extent or large-scale structure of atomic gas reservoirs. To investigate the internal HI kinematics in greater detail, we perform a 3D kinematic forward modeling of the HI disk in UGC 4503. Our analysis reveals an elevated intrinsic velocity dispersion of $σ= 14.9^{+6.1}_{-3.8}$ km/s and a reduced level of rotational support, with $V/σ= 14.28_{-4.17}^{+4.97}$, compared to large-sample star-forming spirals. These kinematic signatures, together with localized residuals in the velocity field, indicate that AGN-driven outflows or jets may inject or indirectly affect the turbulence in the atomic gas disk, potentially regulating the cold gas reservoir. Future GMRT observations, combined with optical integral-field spectroscopy from MaNGA, will enable quantitative constraints on the role of AGN feedback in regulating star formation efficiency across a larger and more representative galaxy sample. |
| title | A Spatially Resolved HI Survey of Seyfert Galaxies: the Role of AGN Feedback in Shaping Atomic Gas Reservoirs |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2605.12973 |