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Karlsruhe 2024 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 30: Cosmic rays 3

T 30.6: Vortrag

Dienstag, 5. März 2024, 17:15–17:30, Geb. 20.30: 2.059

Measuring the Cosmic Ray Sun Shadow with IceCube* — •Niclas Krieger1,2, Jonas Hellrung1,2, Lukas Merten1,2, Frederik Tenholt1,2, and Julia Becker Tjus1,2,3 for the IceCube collaboration — 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 — 3Department of Space, Earth and Environment, Chalmers University of Technology, 412 96 Gothenburg, Sweden

With the IceCube Neutrino Observatory atmospheric muons are detected that are produced when cosmic rays interact with the Earth's atmosphere. On their way to Earth, cosmic rays are blocked by the Sun and the Moon. While the Moon shadow serves as an absolute pointing calibration, the Sun shadow enables an indirect observation of the solar magnetic field. This combination of a turbulent and large-scale field deflects the charged cosmic rays and thus leaves its footprint in the cosmic ray flux. The method of measuring the shadows of these celestial objects will be explained here. Furthermore, it will be shown how these observations help to understand the solar magnetic field better. *Supported by DFG (SFB 1491) and BMBF

Keywords: IceCube; Sun Shadow; Solar Magnetic Field; Atmospheric Muons

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