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• W3212927219 abstract "The origin of cosmic high-energy neutrinos remains largely unexplained. For high-energy neutrino alerts from IceCube, a coincidence with time-variable emission has been seen for three different types of accreting black holes: (1) a gamma-ray flare from a blazar (TXS 0506+056), (2) an optical transient following a stellar tidal disruption event (TDE, AT2019dsg), and (3) an optical outburst from an active galactic nucleus (AGN, AT2019fdr). For the latter two sources, infrared follow-up observations revealed a powerful reverberation signal due to dust heated by the optical/UV/X-ray emission of the flare. This discovery motivates a systematic study of neutrino emission from all black hole flares. Because dust reprocessing is agnostic to the origin of the outburst near the black hole, this work unifies TDEs and high-amplitude flares from AGN. Besides the two known events, we uncover a third flare with a dust echo that is coincident with a PeV-scale neutrino (AT2019aalc). Based solely on the optical and infrared properties, we estimate a significance of 3.6$sigma$ for the neutrino association for these three flares. This association is also supported by the shared radio and X-ray properties of the three flares with dust echoes. These accretion flares are rare--the total light from AGN outshines them by several orders of magnitude--yet they could explain a large fraction of the cosmic high-energy neutrino flux. This tension could be resolved if the efficiency of particle acceleration in accretion disks rapidly increases towards the Eddington limit." @default.
• W3212927219 created "2021-11-22" @default.
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• W3212927219 date "2021-11-17" @default.
• W3212927219 modified "2023-10-13" @default.
• W3212927219 title "Establishing accretion flares from massive black holes as a major source of high-energy neutrinos" @default.
• W3212927219 cites W3017553013 @default.
• W3212927219 doi "https://doi.org/10.48550/arxiv.2111.09391" @default.
• W3212927219 hasPublicationYear "2021" @default.
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