The Disk Wind Contribution to the Gamma-Ray Emission from the Nearby Seyfert Galaxy GRS 1734−292
Radio-quiet Seyfert galaxies have been detected in GeV gamma rays by the Fermi Large Area Telescope (LAT), but the origin of much of this emission is unclear. We consider the nearby example GRS 1734−292, which exhibits weak starburst and jet activities that are insufficient to explain the observed g...
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IOP Publishing
2025-01-01
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| Series: | The Astrophysical Journal |
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| Online Access: | https://doi.org/10.3847/1538-4357/ada55d |
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| author | Nobuyuki Sakai Tomoya Yamada Yoshiyuki Inoue Ellis R. Owen Tomonari Michiyama Ryota Tomaru Yasushi Fukazawa |
| author_facet | Nobuyuki Sakai Tomoya Yamada Yoshiyuki Inoue Ellis R. Owen Tomonari Michiyama Ryota Tomaru Yasushi Fukazawa |
| author_sort | Nobuyuki Sakai |
| collection | DOAJ |
| description | Radio-quiet Seyfert galaxies have been detected in GeV gamma rays by the Fermi Large Area Telescope (LAT), but the origin of much of this emission is unclear. We consider the nearby example GRS 1734−292, which exhibits weak starburst and jet activities that are insufficient to explain the observed gamma-ray flux. With the first detailed multiwavelength study of this source, we demonstrate that an active galactic nucleus (AGN) disk wind can account for its gamma-ray emission. Using a lepto-hadronic emission model based on a shocked ambient medium and a shocked wind region created by an AGN accretion disk wind, we identify two viable scenarios that are consistent with the Fermi-LAT data and multiwavelength observations: a hadronic pp -dominated scenario and a leptonic external-Compton-dominated scenario. Both of these show that future observations with the Cherenkov Telescope Array and the Southern Wide-field Gamma-ray Observatory could detect TeV emission from a disk wind in GRS 1734−292. Such a detection would substantially improve our understanding of cosmic-ray acceleration efficiency in AGN disk wind systems and would establish radio-quiet Seyfert galaxies as cosmic-ray accelerators capable of reaching ultrahigh energies. |
| format | Article |
| id | doaj-art-5d48443d9c044a2687cd4de68f55759a |
| institution | Kabale University |
| issn | 1538-4357 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj-art-5d48443d9c044a2687cd4de68f55759a2025-02-07T09:15:11ZengIOP PublishingThe Astrophysical Journal1538-43572025-01-01980113110.3847/1538-4357/ada55dThe Disk Wind Contribution to the Gamma-Ray Emission from the Nearby Seyfert Galaxy GRS 1734−292Nobuyuki Sakai0https://orcid.org/0009-0004-5978-1785Tomoya Yamada1Yoshiyuki Inoue2https://orcid.org/0000-0002-7272-1136Ellis R. Owen3https://orcid.org/0000-0003-1052-6439Tomonari Michiyama4https://orcid.org/0000-0003-2475-7983Ryota Tomaru5https://orcid.org/0000-0002-6797-2539Yasushi Fukazawa6https://orcid.org/0000-0002-0921-8837Department of Earth and Space Science, Graduate School of Science, Osaka University , 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan ; [email protected] of Earth and Space Science, Graduate School of Science, Osaka University , 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan ; [email protected] of Earth and Space Science, Graduate School of Science, Osaka University , 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan ; [email protected]; Interdisciplinary Theoretical & Mathematical Science Program (iTHEMS) , RIKEN, 2-1 Hirosawa, 351-0198, Japan; Kavli Institute for the Physics and Mathematics of the Universe (WPI), UTIAS, The University of Tokyo , 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8583, JapanDepartment of Earth and Space Science, Graduate School of Science, Osaka University , 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan ; [email protected] of Information Science, Shunan University , 843-4-2 Gakuendai, Shunan, Yamaguchi 745-8566, JapanDepartment of Earth and Space Science, Graduate School of Science, Osaka University , 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan ; [email protected] of Physical Science, Hiroshima University , 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan; Hiroshima Astrophysical Science Center, Hiroshima University , 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan; Core Research for Energetic Universe (Core-U), Hiroshima University , 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, JapanRadio-quiet Seyfert galaxies have been detected in GeV gamma rays by the Fermi Large Area Telescope (LAT), but the origin of much of this emission is unclear. We consider the nearby example GRS 1734−292, which exhibits weak starburst and jet activities that are insufficient to explain the observed gamma-ray flux. With the first detailed multiwavelength study of this source, we demonstrate that an active galactic nucleus (AGN) disk wind can account for its gamma-ray emission. Using a lepto-hadronic emission model based on a shocked ambient medium and a shocked wind region created by an AGN accretion disk wind, we identify two viable scenarios that are consistent with the Fermi-LAT data and multiwavelength observations: a hadronic pp -dominated scenario and a leptonic external-Compton-dominated scenario. Both of these show that future observations with the Cherenkov Telescope Array and the Southern Wide-field Gamma-ray Observatory could detect TeV emission from a disk wind in GRS 1734−292. Such a detection would substantially improve our understanding of cosmic-ray acceleration efficiency in AGN disk wind systems and would establish radio-quiet Seyfert galaxies as cosmic-ray accelerators capable of reaching ultrahigh energies.https://doi.org/10.3847/1538-4357/ada55dSeyfert galaxiesGamma-raysCosmic raysActive galactic nuclei |
| spellingShingle | Nobuyuki Sakai Tomoya Yamada Yoshiyuki Inoue Ellis R. Owen Tomonari Michiyama Ryota Tomaru Yasushi Fukazawa The Disk Wind Contribution to the Gamma-Ray Emission from the Nearby Seyfert Galaxy GRS 1734−292 The Astrophysical Journal Seyfert galaxies Gamma-rays Cosmic rays Active galactic nuclei |
| title | The Disk Wind Contribution to the Gamma-Ray Emission from the Nearby Seyfert Galaxy GRS 1734−292 |
| title_full | The Disk Wind Contribution to the Gamma-Ray Emission from the Nearby Seyfert Galaxy GRS 1734−292 |
| title_fullStr | The Disk Wind Contribution to the Gamma-Ray Emission from the Nearby Seyfert Galaxy GRS 1734−292 |
| title_full_unstemmed | The Disk Wind Contribution to the Gamma-Ray Emission from the Nearby Seyfert Galaxy GRS 1734−292 |
| title_short | The Disk Wind Contribution to the Gamma-Ray Emission from the Nearby Seyfert Galaxy GRS 1734−292 |
| title_sort | disk wind contribution to the gamma ray emission from the nearby seyfert galaxy grs 1734 292 |
| topic | Seyfert galaxies Gamma-rays Cosmic rays Active galactic nuclei |
| url | https://doi.org/10.3847/1538-4357/ada55d |
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