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Candidate Tidal Disruption Event AT2019fdr Coincident with a High-Energy Neutrino

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arxiv 2111.09390 v2 pith:HCMHPNUK submitted 2021-11-17 astro-ph.HE

Candidate Tidal Disruption Event AT2019fdr Coincident with a High-Energy Neutrino

classification astro-ph.HE
keywords neutrinohigh-energyat2019fdrbrightcandidatecoincidentdisruptionevent
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The origins of the high-energy cosmic neutrino flux remain largely unknown. Recently, one high-energy neutrino was associated with a tidal disruption event (TDE). Here we present AT2019fdr, an exceptionally luminous TDE candidate, coincident with another high-energy neutrino. Our observations, including a bright dust echo and soft late-time X-ray emission, further support a TDE origin of this flare. The probability of finding two such bright events by chance is just 0.034%. We evaluate several models for neutrino production and show that AT2019fdr is capable of producing the observed high-energy neutrino, reinforcing the case for TDEs as neutrino sources.

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