Could TDE outflows produce the PeV neutrino events?

Abstract

A tidal disruption event (TDE), AT2019dsg, was observed to be associated with a PeV neutrino event, IceCube-191001A, lagging the optical outburst by a half year. It is known that TDEs may generate ultrafast outflows. If the TDE occurs in a cloudy environment, the outflow-cloud interactions may form shock waves which generate accelerated protons and hence delayed neutrinos from hadronic interactions in clouds. Here we investigate the neutrino production in AT2019dsg by examining the TDE outflow-cloud interaction model. We find that, for an outflow with a velocity of 0.07c and a kinetic luminosity of $10^{45}\mathrm{erg}{\mathrm{s}}^{-1}$, protons may be accelerated up to $\sim$ 60 PeV by the bow shocks, and generate PeV neutrinos by interactions with clouds. The predicted neutrino number in this model depends on the uncertainties of model parameters and in order to match the observations, some challenging values of parameters have been involved. The PeV neutrino event number can be $\sim 4\times 10^{-3}$ for a hard proton index $\Gamma =1.5$.

8 pages, MNRAS in press

References in corpus (7)

• Parameterization of Gamma, e^+/- and Neutrino Spectra Produced by p-p Interaction in Astronomical Environment
• Gamma-ray flares from red giant/jet interactions in AGN
• Radio Observations of an Ordinary Outflow from the Tidal Disruption Event AT2019dsg
• Accretion disc cooling and narrow absorption lines in the tidal disruption event AT 2019dsg
• Neutrino Emission from an Off-Axis Jet Driven by the Tidal Disruption Event AT2019dsg
• Radio Emission from Outflow-Cloud Interaction and Its Constraint on TDE Outflow
• Neutrinos from tidal disruption events

Cited by in corpus (10)

• Science objectives of the Einstein Probe mission
• Interpretation of the observed neutrino emission from three Tidal Disruption Events
• AT2021lwx: Another Neutrino-Coincident Tidal Disruption Event with a Strong Dust Echo?
• Interaction of an outflow with surrounding gaseous clouds as the origin of the late-time radio flares in TDEs
• Tidal Disruption Events and Dark Matter Scatterings with Neutrinos and Photons
• Electromagnetic Cascade Emission from Neutrino-Coincident Tidal Disruption Events
• Radio emission from tidal disruption events produced by the collision between super-Eddington outflows and the circumnuclear medium
• Choked jets in expanding envelope as the origin of the neutrino emission associated with Tidal Disruption Events
• Quasi-perpendicular shock acceleration and TDE radio flares
• X-ray from Outflow-Cloud Interaction and Its Application in Tidal Disruption Events