Seyfert Galaxies as Neutrino Sources: An Outflow$-$Cloud Interaction Perspective
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arXiv
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| Auteurs principaux: | , , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866910114345123840 |
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| author | Ma, Zhi-Peng Wang, Kai Zuo, Yuan-Yuan Zou, Yuan-Chuan |
| author_facet | Ma, Zhi-Peng Wang, Kai Zuo, Yuan-Yuan Zou, Yuan-Chuan |
| contents | Following the identification of the first confirmed individual neutrino source, Seyfert galaxies have emerged as the most prominent class of high-energy neutrino emitters. In this work, we perform a detailed investigation of the outflow--cloud interaction scenario for neutrino production in Seyfert nuclei. In this framework, fast AGN-driven winds collide with clumpy gas clouds in the nuclear region, forming bow shocks that efficiently accelerate cosmic-ray protons. The accelerated protons subsequently interact with cold protons from the outflows via inelastic proton--proton ($pp$) collisions, producing high-energy neutrinos, while the photomeson ($pγ$) process with disk photons may provide a subdominant contribution at the highest energies. Applying this model to five neutrino-associated Seyfert galaxies, we successfully reproduce the observed TeV neutrino fluxes without violating existing gamma-ray constraints. By integrating over the Seyfert population using X-ray luminosity functions, we further demonstrate that Seyfert galaxies can account for a substantial fraction of the diffuse astrophysical neutrino background in the $10^4-10^5~{\rm GeV}$ energy range. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_06707 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Seyfert Galaxies as Neutrino Sources: An Outflow$-$Cloud Interaction Perspective Ma, Zhi-Peng Wang, Kai Zuo, Yuan-Yuan Zou, Yuan-Chuan High Energy Astrophysical Phenomena Following the identification of the first confirmed individual neutrino source, Seyfert galaxies have emerged as the most prominent class of high-energy neutrino emitters. In this work, we perform a detailed investigation of the outflow--cloud interaction scenario for neutrino production in Seyfert nuclei. In this framework, fast AGN-driven winds collide with clumpy gas clouds in the nuclear region, forming bow shocks that efficiently accelerate cosmic-ray protons. The accelerated protons subsequently interact with cold protons from the outflows via inelastic proton--proton ($pp$) collisions, producing high-energy neutrinos, while the photomeson ($pγ$) process with disk photons may provide a subdominant contribution at the highest energies. Applying this model to five neutrino-associated Seyfert galaxies, we successfully reproduce the observed TeV neutrino fluxes without violating existing gamma-ray constraints. By integrating over the Seyfert population using X-ray luminosity functions, we further demonstrate that Seyfert galaxies can account for a substantial fraction of the diffuse astrophysical neutrino background in the $10^4-10^5~{\rm GeV}$ energy range. |
| title | Seyfert Galaxies as Neutrino Sources: An Outflow$-$Cloud Interaction Perspective |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2511.06707 |