SMuK 2023 – scientific programme

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T: Fachverband Teilchenphysik

T 16: Neutrino Astronomy I

T 16.1: Talk

Monday, March 20, 2023, 16:30–16:45, POT/0112

Quasi-periodic oscillations in J1048.4+714 - comparison of hadronic and leptonic signatures^* — •Tom Mianecki^{1, 2}, Julia Becker Tjus^{1, 2}, and Leander Schlegel^{1, 2} — ¹Theoretische Physik IV, Ruhr Universität Bochum, Bochum, Germany — ²RAPP-Center at Ruhr Universität Bochum, Bochum, Germany

Active Galactic Nuclei belong to the most luminous known astrophysical sources of high energy radiation. They are assumed to produce charged particles as well as uncharged messengers as photons and neutrinos via leptonic as well as hadronic processes and show a strong time-variability in their corresponding light curves. The quasi-periodic behaviour of the recently analyzed light curve of the source J1048.4+714 especially raises the question of the creation of such temporal structures. One explanation is that the shape of the light curve stems from a precessing jet. In this work, we compare the photon flux produced via the pp→ π⁰→γγ channel and the photon flux produced from synchrotron self-compton scattering in dependence of parameters of the emitting region. Furthermore, we investigate the differences of the flaring durations of the source defined by two methods, i.e. full-width at half-maximum method and the centroid method. Finally we evaluate the results with respect to the curvature parameter of the SEDs in the flaring phase. With these investigations we aim to reach a better understanding of the quasi-periodic oscillations in AGN and the interpretation of high-energy radiation signatures.

^*Supported by DFG (SFB 1491)