An Accretion Flare Interpretation for the Ultra-High-Energy Neutrino Event KM3-230213A
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arXiv
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866915767960731648 |
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| author | Yuan, Chengchao Pfeiffer, Leonard Winter, Walter Zaballa, Jose Maria Sanchez Buson, Sara Testagrossa, Federico Azzollini, Alessandra |
| author_facet | Yuan, Chengchao Pfeiffer, Leonard Winter, Walter Zaballa, Jose Maria Sanchez Buson, Sara Testagrossa, Federico Azzollini, Alessandra |
| contents | We study the origin of the ultra-high-energy (UHE) neutrino event KM3-230213A detected by KM3NeT, focusing on MRC 0614-083 which has been pinpointed as the closest blazar to the neutrino localization exhibiting variable multi-wavelength emission. A joint interpretation of the optical, infrared, and X-ray light curves suggests that MRC 0614-083 has undergone a super-Eddington accretion flare accompanied by efficient proton acceleration. That flare has initiated a delayed infrared echo within the surrounding dust torus, which serves as a target for photomeson ($pγ$) interactions such that a self-consistent picture emerges that complements the blazar jet scenario: the predicted UHE neutrino flux is at the level expected from joint $E^{-2}$ fit with the IceCube measurements at lower energies, the variable nature of the event alleviates the tension with IceCube limits, and the accompanying electromagnetic cascade describes the X-ray flare around the neutrino detection time. Since a key remaining uncertainty is the unknown redshift of the source, we strongly encourage optical/ultraviolet spectroscopic measurements to determine its redshift. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2506_21111 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | An Accretion Flare Interpretation for the Ultra-High-Energy Neutrino Event KM3-230213A Yuan, Chengchao Pfeiffer, Leonard Winter, Walter Zaballa, Jose Maria Sanchez Buson, Sara Testagrossa, Federico Azzollini, Alessandra High Energy Astrophysical Phenomena We study the origin of the ultra-high-energy (UHE) neutrino event KM3-230213A detected by KM3NeT, focusing on MRC 0614-083 which has been pinpointed as the closest blazar to the neutrino localization exhibiting variable multi-wavelength emission. A joint interpretation of the optical, infrared, and X-ray light curves suggests that MRC 0614-083 has undergone a super-Eddington accretion flare accompanied by efficient proton acceleration. That flare has initiated a delayed infrared echo within the surrounding dust torus, which serves as a target for photomeson ($pγ$) interactions such that a self-consistent picture emerges that complements the blazar jet scenario: the predicted UHE neutrino flux is at the level expected from joint $E^{-2}$ fit with the IceCube measurements at lower energies, the variable nature of the event alleviates the tension with IceCube limits, and the accompanying electromagnetic cascade describes the X-ray flare around the neutrino detection time. Since a key remaining uncertainty is the unknown redshift of the source, we strongly encourage optical/ultraviolet spectroscopic measurements to determine its redshift. |
| title | An Accretion Flare Interpretation for the Ultra-High-Energy Neutrino Event KM3-230213A |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2506.21111 |