Heidelberg 2022 – wissenschaftliches Programm

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EP: Fachverband Extraterrestrische Physik

EP 7: Astrophysics

EP 7.10: Vortrag

Mittwoch, 23. März 2022, 18:30–18:40, EP-H1

Understanding the multi-wavelength variabilty of TeV blazar VER J0521+211 with high-energy particle interactions — •Anastasiia Omeliukh — Ruhr University Bochum, Faculty of Physics and Astronomy, Astronomical Institute, Universitätsstr. 150, 44801 Bochum, Germany

In spring 2020, the MAGIC collaboration detected photons with energies above 200 GeV from the source VER J0521+211 which provides evidence of efficient particle acceleration in a relativistic jet. The monitoring of the source's short-term variability in very-high-energy gamma rays is complemented by simultaneous data from other observatories in radio, optical, X-ray, and GeV gamma rays. We perform multi-wavelength modeling of this source with a fully self-consistent one-zone leptohadronic model to explain four different multi-wavelength data sets. While the radio and optical fluxes seem to originate from electron synchrotron emission, in this model the gamma-ray fluxes are well explained by electromagnetic cascades induced by proton interactions.