Würzburg 2018 – scientific programme
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T: Fachverband Teilchenphysik
T 78: Kosmische Strahlung IV
T 78.6: Talk
Thursday, March 22, 2018, 17:45–18:00, Philo-HS6
Tidally disrupted stars as a possible origin of both cosmic rays and neutrinos at the highest energies — •Daniel Biehl1, Denise Boncioli1, Cecilia Lunardini2, and Walter Winter1 — 1Deutsches Elektronen-Synchrotron (DESY), Platanenallee 6, D-15738 Zeuthen, Germany — 2Department of Physics, Arizona State University, 450 E. Tyler Mall, Tempe, AZ 85287-1504 USA
Tidal Disruption Events (TDEs) are processes where stars are torn apart by the strong gravitational force near to a massive or supermassive black hole. If a jet is launched in such a process, particle acceleration may take place in internal shocks. We demonstrate that jetted TDEs can simultaneously describe the observed neutrino and cosmic ray fluxes at the highest energies if stars with heavier compositions, such as carbon-oxygen white dwarfs, are tidally disrupted and these events are sufficiently abundant. We simulate the photo-hadronic interactions both in the TDE jet and in the propagation through the extragalactic space and we show that the simultaneous description of Ultra-High Energy Cosmic Ray (UHECR) and PeV neutrino data implies that a nuclear cascade in the jet develops by photo-hadronic interactions.