Are Hot-Coronae of Seyfert Galaxies truly emitters of High-Energy Neutrinos and Cosmic-Rays?

The IceCube Collaboration has recently reported compelling evidence of high energy neutrino emission from NGC 1068, and mild excesses for other 3 local Seyfert galaxies. This sparked a surge of interest in neutrino emissions from the hot coronae around supermassive black holes in Seyfert galaxies. In this talk, I demonstrate that these sources are consistent with sub-equipartition between Cosmic rays (CRs) and the magnetic energy densities. Nonetheless, the energetics carried by CRs is rather high, making future analyses fundamental to investigate if such conditions can be met in the environment of seyfert galaxies. I will estimate the neutrino flux of whole seyfert population, and I will demonstrate that it might overestimate the diffuse neutrino flux at 1-10 TeV energies leading to a potential tension in the high-energy neutrino sky. Therefore, not all the AGNs might be neutrino emitters and potentially the IceCube diffuse flux might be dominated by a very local population of Active Galactic Nuclei (AGNs).

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Publication Details

Published
2025-09-24
DOI
https://doi.org/10.22323/1.501.0978
Primary Topic
Astrophysics and Cosmic Phenomena
Type
article
Field-Weighted Citation Impact
0.00

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article

Are Hot-Coronae of Seyfert Galaxies truly emitters of High-Energy Neutrinos and Cosmic-Rays?

Antonio Ambrosone
Astrophysics and Cosmic Phenomena
article

Are Hot-Coronae of Seyfert Galaxies truly emitters of High-Energy Neutrinos and Cosmic-Rays?

Antonio Ambrosone
article en

Abstract

The IceCube Collaboration has recently reported compelling evidence of high energy neutrino emission from NGC 1068, and mild excesses for other 3 local Seyfert galaxies. This sparked a surge of interest in neutrino emissions from the hot coronae around supermassive black holes in Seyfert galaxies. In this talk, I demonstrate that these sources are consistent with sub-equipartition between Cosmic rays (CRs) and the magnetic energy densities. Nonetheless, the energetics carried by CRs is rather high, making future analyses fundamental to investigate if such conditions can be met in the environment of seyfert galaxies. I will estimate the neutrino flux of whole seyfert population, and I will demonstrate that it might overestimate the diffuse neutrino flux at 1-10 TeV energies leading to a potential tension in the high-energy neutrino sky. Therefore, not all the AGNs might be neutrino emitters and potentially the IceCube diffuse flux might be dominated by a very local population of Active Galactic Nuclei (AGNs).

Istituto Nazionale di Fisica Nucleare
Openalex Percentile: Top 89%
Astrophysics and Cosmic Phenomena
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Are Hot-Coronae of Seyfert Galaxies truly emitters of High-Energy Neutrinos and Cosmic-Rays? — Antonio Ambrosone · (2025) | TGRS Research Map | TGRS