Göttingen 2025 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 75: Neutrino Astronomy IV

T 75.8: Vortrag

Donnerstag, 3. April 2025, 18:00–18:15, VG 1.105

Using CRPropa to reconstruct the high energy neutrino emission of NGC 1068 ^* — •Alexander Kazatsky, Julia Becker Tjus, Björn Eichmann, and Julien Dörner — Theoretical Physics IV, Faculty of Physics and Astronomy, Ruhr-University Bochum, Universitätsstraße 150, 44801 Bochum

The Seyfert 2 galaxy NGC 1068 (also known as Messier 77) is one of the closest active galaxies for which a high energy neutrino flux has been detected by the IceCube Neutrino Observatory. Previous works have concluded that the neutrino emission is likely to originate from a region of the active galactic nucleus (AGN) called the AGN corona. In this work, this neutrino emission is calculated by developing a threedimensional model for the corona of NGC 1068 using a modified version of the publically available CRPropa propagation framework. The diffusive transport of the underlying cosmic rays is solved via stochastic differential equations in 3D space and different hadronic processes are taken into account for the generation of the overall non thermal emission. The resulting neutrino flux is compared to the available IceCube data to optimise the model of the AGN environment. ^* Supported by SFB 1491

Keywords: CRPropa; NGC 1068; IceCube; AGN corona