Abstrato

Look for Gamma-Ray Emission from Tidal Disruption Events that may be Related to Ice Cube Neutrinos in Accretion Flares

Sophie Relish

High-energy neutrinos may originate from outflows or disk-coronas created in tidal disruption events (TDEs) of supermassive black holes. According to multi-messenger follow-ups, three TDEs (AT2019 dsg, AT2019 fdr, and AT2019 aalc) are connected to high-energy astrophysical neutrinos. For the three sources, no GeV photons are present with the neutrino. In this study, we looked for high-energy gamma-ray emissions from a bigger sample of TDE candidates that had been seen by the Zwicky Transient Facility (ZTF). The highest limits of the gamma-ray emission flow are reported, and no substantial GeV emission was seen. The aggregate gamma-ray emission of this class of sources was not strong enough to be observed by the Fermi Large Area Telescope, therefore we did a stacking analysis for the sample sources (Fermi-LAT). The high-energy gamma-ray emission from the sample TDEs may not have been detected because the source absorbs the gamma rays with soft photons. The top limit on the emission radius of the neutrino generation for these TDEs is determined using a model-based hypothesis: For average TDE parameter values, R 1016 cm.