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arXiv · 2508.07940

Neutrino and Electromagnetic Signals from Tidal Disruption Events: Bridging the Theory with Observations

Chengchao Yuan·Walter Winter·Cecilia Lunardini·B. Theodore Zhang·Kohta Murase·Bing Zhang
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Abstract

This proceeding presents recent results from a joint analysis of time-dependent neutrino and electromagnetic emissions from tidal disruption events (TDEs), using both isotropic wind models and relativistic jets. We discuss constraints from Fermi Large Area Telescope (LAT) $\gamma$-ray upper limits on the size of the radiation zone and the maximum energies of accelerated cosmic rays, as well as the resulting neutrino productions from TDEs and candidates, including AT 2019dsg, AT 2019fdr, AT 2019aalc, and AT 2021lwx. The Fermi upper limits correspond to a generic neutrino detection rate of $\lesssim0.01-0.1$ per TDE. Additionally, we explore multi-wavelength modeling of jetted TDEs with luminous X-ray afterglows, another TDE subclass, by incorporating the dynamics of structured jets with time-dependent energy injection. We also examine the connection between neutrinos and their multi-wavelength counterparts, highlighting implications for future multi-messenger discoveries with IceCube, IceCube-Gen2, KM3NeT, and Fermi-LAT.

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Chengchao Yuan, Walter Winter, Cecilia Lunardini, B. Theodore Zhang, Kohta Murase, Bing Zhang. 2025-08-11. Neutrino and Electromagnetic Signals from Tidal Disruption Events: Bridging the Theory with Observations. https://arxiv.org/abs/2508.07940

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