Seoul National University AGN Monitoring Project. V. Velocity-resolved H-beta Reverberation Mapping and Evidence of Kinematics Evolution
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2025
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| author | Wang, Shu Woo, Jong-Hak Barth, Aaron J. Bennert, Vardha N. Gallo, Elena Hodges-Kluck, Edmund Kim, Minjin Rakshit, Suvendu Treu, Tommaso Cho, Hojin Kabasares, Kyle M. Malkan, Matthew A. Mandal, Amit Kumar Son, Donghoon U, Vivian Villafana, Lizvette |
| author_facet | Wang, Shu Woo, Jong-Hak Barth, Aaron J. Bennert, Vardha N. Gallo, Elena Hodges-Kluck, Edmund Kim, Minjin Rakshit, Suvendu Treu, Tommaso Cho, Hojin Kabasares, Kyle M. Malkan, Matthew A. Mandal, Amit Kumar Son, Donghoon U, Vivian Villafana, Lizvette |
| contents | We present velocity-resolved reverberation lags of H-beta for 20 active galactic nuclei (AGNs) from the Seoul National University AGN Monitoring Project. We detect unambiguous velocity-resolved structures in 12 AGNs, among which eight objects exhibit symmetric structures, two objects show inflow-like characteristics, and two objects display outflow-like signatures. For two AGNs, we successfully measure the velocity-resolved lags in different years, revealing evidence of evolving broad-line region (BLR) kinematics. By combining our sample with the literature velocity-resolved lags, we find that the symmetric velocity-resolved lags are the most common (40%) type among this sample. The frequency of inflow kinematics is also notable (20%), while outflow kinematics are less common (11%). Our sample significantly expands the previous velocity-resolved reverberation mapping sample in the high-luminosity regime, enabling us to constrain BLR kinematics across a large dynamic range of luminosity. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_15073 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Seoul National University AGN Monitoring Project. V. Velocity-resolved H-beta Reverberation Mapping and Evidence of Kinematics Evolution Wang, Shu Woo, Jong-Hak Barth, Aaron J. Bennert, Vardha N. Gallo, Elena Hodges-Kluck, Edmund Kim, Minjin Rakshit, Suvendu Treu, Tommaso Cho, Hojin Kabasares, Kyle M. Malkan, Matthew A. Mandal, Amit Kumar Son, Donghoon U, Vivian Villafana, Lizvette Astrophysics of Galaxies We present velocity-resolved reverberation lags of H-beta for 20 active galactic nuclei (AGNs) from the Seoul National University AGN Monitoring Project. We detect unambiguous velocity-resolved structures in 12 AGNs, among which eight objects exhibit symmetric structures, two objects show inflow-like characteristics, and two objects display outflow-like signatures. For two AGNs, we successfully measure the velocity-resolved lags in different years, revealing evidence of evolving broad-line region (BLR) kinematics. By combining our sample with the literature velocity-resolved lags, we find that the symmetric velocity-resolved lags are the most common (40%) type among this sample. The frequency of inflow kinematics is also notable (20%), while outflow kinematics are less common (11%). Our sample significantly expands the previous velocity-resolved reverberation mapping sample in the high-luminosity regime, enabling us to constrain BLR kinematics across a large dynamic range of luminosity. |
| title | Seoul National University AGN Monitoring Project. V. Velocity-resolved H-beta Reverberation Mapping and Evidence of Kinematics Evolution |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2505.15073 |