Karlsruhe 2024 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 10: Gamma astronomy 1
T 10.6: Vortrag
Montag, 4. März 2024, 17:15–17:30, Geb. 30.22: kl. HS A
Expanding the Multi-Messenger Picture of J1048+7143 with the Optical Light Curve* — •Johannes Just1,2, Ilja Jaroschewski1,2, Emma Kun1,2,3,4, and Julia Becker Tjus1,2,5 — 1Theoretical Physics IV, Plasma Astroparticle Physics, Faculty for Physics and Astronomy, Ruhr University Bochum, 44780 Bochum, Germany — 2Ruhr Astroparticle and Plasma Physics Center (RAPP Center), Germany — 3Astronomical Institute, Faculty for Physics and Astronomy, Ruhr University Bochum, 44780 Bochum, Germany — 43CSFK, MTA Centre of Excellence, Hungary — 5Department of Space, Earth and Environment, Chalmers University of Technology, 412 96 Gothenburg, Sweden
The gamma-ray and radio light curves of J1048+7143 reveal a pattern of quasi-periodic oscillations that can be explained by the existence of a supermassive binary black hole inspiral at its core. In such a model, the light curves are explainable via jet precession of the dominant supermassive black hole jet caused by spin-orbit coupling.
In this work, we add optical data in the V and G band to the multi-messenger picture. We determine the duration and occurrence times of the flares with this new, optical data and predict the time of the next flare. With the results obtained using this optical data, we build a consistent model across the wavelengths. The Fermi-LAT gamma-ray and optical light curve of the blazar show a double flare substructure in the main flares while the radio light curve does not show this feature. In our model, we work out a scenario for which the different wavelengths can be explained consistently. *Supported by DFG (SFB 1491)
Keywords: Supermassive Binary Black Holes; Active Galactic Nuclei - Blazars; Gamma rays; Radio waves; Optical Light Curve