Neutrino Emission from an Off-Axis Jet Driven by the Tidal Disruption Event AT2019dsg

Abstract

Recently, a high-energy muon neutrino event was detected in association with a tidal disruption event (TDE) AT2019dsg at the time about 150 days after the peak of the optical/UV luminosity. We propose that such a association could be interpreted as arising from hadronic interactions between relativistic protons accelerated in the jet launched from the TDE and the intense radiation field of TDE inside the optical/UV photosphere, if we are observing the jet at a moderate angle (i.e., approximately 10-30 degree) with respect to the jet axis. Such an off-axis viewing angle leads to a high gas column density in the line of sight which provides a high opacity for the photoionization and the Bethe-Heitler process, {and allows the existence of an intrinsic long-term X-ray radiation of comparatively high emissivity}. As a result, the cascade emission accompanying the neutrino production, which would otherwise overshoot the flux limits in X-ray and/or GeV band, is significantly obscured or absorbed. Since the jets of TDEs are supposed to be randomly oriented in the sky, the source density rate of TDE with an off-axis jet is significantly higher than that of TDE with an on-axis jet. Therefore, an off-axis jet is naturally expected in a nearby TDE being discovered, supporting the proposed scenario.

8 pages, 4 figures, published in PRD, 102, 083028

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• AT2021lwx: Another Neutrino-Coincident Tidal Disruption Event with a Strong Dust Echo?
• Unified thermal model for photohadronic neutrino production in astrophysical sources
• Neutrinos from tidal disruption events
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• High-resolution VLBI observations of and modelling the radio emission from the TDE AT2019dsg
• Electromagnetic Cascade Emission from Neutrino-Coincident Tidal Disruption Events
• Choked jets in expanding envelope as the origin of the neutrino emission associated with Tidal Disruption Events
• Constraints on the hosts of UHECR accelerators
• Structured Jet Model for Multiwavelength Observations of the Jetted Tidal Disruption Event AT 2022cmc
• Multi-messenger signatures of delayed choked jets in tidal disruption events
• Search for neutrinos from the tidal disruption events AT2019dsg and AT2019fdr with the ANTARES telescope
• What powers the radio emission in TDE AT2019dsg: a long-lived jet or the disruption itself?
• A pure hadronic model description of the observed neutrino emission from the tidal disruption event AT2019dsg