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EP: Fachverband Extraterrestrische Physik

EP 13: Astrophysics: Galaxies II

EP 13.1: Invited Talk

Thursday, March 23, 2023, 17:30–18:00, ZEU/0160

Time-dependent data analysis of a blazar flare — •Maximilian Albrecht and Felix Spanier — Universität Heidelberg - ITA

Active Galactic Nuclei (AGN) have been discussed as possible accelerators of ultra high-energy cosmic rays for quite some time. While direct observations of cosmic ray sources are still difficult, the emission of neutrinos could be observed directly. Various AGN emission models link the photon, cosmic ray and neutrino emission. Understanding and modeling the emission can help identifying AGN as cosmic accelerators. The available observational data does not yet allow for unique models, but considering also the time domain may aid in understanding the underlying emission mechanisms.

In this talk results of modeling the eruption of the blazar TXS 0506+056 in 2017 are discussed. This blazar was identified as the source of the high-energy muon neutrino IceCube-1709222A detected by the IceCube telescope. From a subsequent multimessenger-campaign a longer time series is available. Using the time-dependent, self-consistent, lepto-hadronic UNICORN-0D the observational data was simulated. We will discuss the possibilities of using time-dependent models to unveil the emission mechanisms and subsequently the associated spectrum of ultra-high energy cosmic rays.