Highlight: A tidal disruption event coincident with a high-energy neutrino

Discussion timeslot (ZOOM-Meeting): 13. July 2021 - 16:00
ZOOM-Meeting URL: https://desy.zoom.us/j/92846730262
ZOOM-Meeting ID: 92846730262
ZOOM-Meeting Passcode: ICRC2021
Corresponding Session: https://icrc2021-venue.desy.de/channel/Plenary-Highlight-02/66
Live-Stream URL: https://icrc2021-venue.desy.de/livestream/Plenary-01/1

Abstract:
'IceCube discovered a diffuse flux of high-energy neutrinos in 2013, and recently identified the flaring gamma-ray blazar TXS 0506+056 as a likely neutrino source. However, a combined analysis of the entire resolved gamma-ray blazar population limited the contribution of such objects to no more than 27% of the total neutrino flux, leaving the vast majority of the neutrino flux unexplained. Here we present the identification of a second probable neutrino source, the Tidal Disruption Event (TDE) AT2019dsg, found as part of a systematic search for optical counterparts to high-energy neutrinos using the Zwicky Transient Facility. The probability of finding such a TDE with our follow-up program by chance is just 0.2%. Multi-wavelength observations reveal the presence of a central engine powering particle acceleration in AT2019dsg, and confirm that this object can satisfy necessary conditions for PeV neutrino production.'

Authors: Robert Stein
Collaboration: Zwicky Transient Facility (ZTF)

Indico-ID: 618
Proceeding URL: https://pos.sissa.it/395/009