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Candidate Tidal Disruption Event AT2019fdr Coincident with a High-Energy Neutrino
Simeon Reusch1,2, Robert Stein1,2,3, Marek Kowalski1,2
1Deutsches Elektronen Synchrotron DESY, Platanenallee 6, D-15738 Zeuthen, Germany.
Physical Review Letters
|June 17, 2022
Summary
High-energy neutrinos may originate from tidal disruption events (TDEs). Researchers found a luminous TDE candidate, AT2019fdr, linked to a high-energy neutrino, strengthening the TDE-neutrino source connection.
Area of Science:
- Astrophysics
- Particle Physics
- Cosmic Rays
Background:
- The origin of high-energy cosmic neutrinos is a significant unsolved problem in astrophysics.
- Recent studies have suggested a potential link between high-energy neutrinos and tidal disruption events (TDEs).
Purpose of the Study:
- To investigate the association between the luminous tidal disruption event candidate AT2019fdr and high-energy neutrinos.
- To evaluate the potential of TDEs as sources of high-energy neutrinos.
Main Methods:
- Multi-wavelength observations of the tidal disruption event candidate AT2019fdr.
- Analysis of coincident high-energy neutrino events.
- Modeling of neutrino production mechanisms within TDEs.
Main Results:
- AT2019fdr, an exceptionally luminous TDE candidate, was identified.
- This TDE candidate was coincident with a high-energy neutrino event.
- Observations revealed a bright dust echo and soft late-time X-ray emission, supporting a TDE origin.
- The probability of this chance coincidence is low (0.034%).
Conclusions:
- The findings provide strong evidence supporting tidal disruption events as sources of high-energy neutrinos.
- AT2019fdr is capable of producing the observed high-energy neutrino, reinforcing the TDE-neutrino source hypothesis.
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