{"paper":{"title":"A Spatially Resolved HI Survey of Seyfert Galaxies: the Role of AGN Feedback in Shaping Atomic Gas Reservoirs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"Seyfert galaxy HI disks follow the same mass-size relation as star-forming spirals within uncertainties.","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Chen Xu, Chuan-Peng Zhang, Daizhong Liu, Fujia Li, Hang Zhou, Hong-Xin Zhang, Hui Shi, Jing Wang, Le Zhang, Mengting Ju, Ming Zhu, Ningyu Tang, Pengfei Ren, Ruitian Li, Shengzhe Wang, Sijia Li, Xiao-Lei Meng, Xin Wang, Xinwen Shu, Yiming Yang, Yuxuan Pang, Zheng Zheng","submitted_at":"2026-05-13T04:10:59Z","abstract_excerpt":"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 canonic"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"AGN feedback does not significantly disrupt the global extent or large-scale structure of atomic gas reservoirs, as the measured HI mass-size relation slope remains consistent with the canonical value within 2 sigma uncertainties.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"The small sample of eight Seyfert galaxies is representative of the broader AGN population and that direct comparison to large samples of star-forming spirals is valid without major selection biases.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"Seyfert AGN hosts show an HI mass-size relation consistent with normal galaxies within 2 sigma, with one galaxy displaying elevated velocity dispersion suggestive of AGN-driven turbulence.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"Seyfert galaxy HI disks follow the same mass-size relation as star-forming spirals within uncertainties.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"1f4852808a3d29853f65cda8198fa4e437e78948a840122fd16942cdf60b2127"},"source":{"id":"2605.12973","kind":"arxiv","version":1},"verdict":{"id":"c6dd1cd1-9f6c-4d18-96f1-cb195c641148","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-14T18:42:31.590715Z","strongest_claim":"AGN feedback does not significantly disrupt the global extent or large-scale structure of atomic gas reservoirs, as the measured HI mass-size relation slope remains consistent with the canonical value within 2 sigma uncertainties.","one_line_summary":"Seyfert AGN hosts show an HI mass-size relation consistent with normal galaxies within 2 sigma, with one galaxy displaying elevated velocity dispersion suggestive of AGN-driven turbulence.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"The small sample of eight Seyfert galaxies is representative of the broader AGN population and that direct comparison to large samples of star-forming spirals is valid without major selection biases.","pith_extraction_headline":"Seyfert galaxy HI disks follow the same mass-size relation as star-forming spirals within uncertainties."},"references":{"count":91,"sample":[{"doi":"10.1088/0067-0049/182/2/543","year":2009,"title":"Abazajian, K. N., Adelman-McCarthy, J. K., Ag¨ ueros, M. A., et al. 2009, ApJS, 182, 543, doi: 10.1088/0067-0049/182/2/543 Astropy Collaboration, Price-Whelan, A. M., Lim, P. L., et al. 2022, ApJ, 935","work_id":"a2b8de51-d046-42bd-ab8a-a181bcd0ef82","ref_index":1,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"10.1093/mnras/stab780","year":2021,"title":"R., Wuyts, S., F¨ orster Schreiber, N","work_id":"774d45fb-4af0-4558-aa64-ad4c7a525150","ref_index":2,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"10.1086/130766","year":1981,"title":"Baldwin, J. A., Phillips, M. M., & Terlevich, R. 1981, PASP, 93, 5, doi: 10.1086/130766","work_id":"72552c13-e5fc-4a98-8b58-d2e53d1b89aa","ref_index":3,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"10.1051/0004-6361:20053210","year":2006,"title":"2006, A&A, 447, 49, doi: 10.1051/0004-6361:20053210","work_id":"9035d5bd-5e05-4e60-b07d-d01ed5e6c950","ref_index":4,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":1989,"title":"Begeman, K. G. 1989, A&A, 223, 47","work_id":"f1cbfd4d-6c1b-495e-b317-77dcd0d4740e","ref_index":5,"cited_arxiv_id":"","is_internal_anchor":false}],"resolved_work":91,"snapshot_sha256":"d5f3e7703bc5923abc129793dfc1f083b29f8ddddd1d5f912fd50f4b7307272d","internal_anchors":2},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}