Göttingen 2025 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 37: Cosmic Rays II
T 37.1: Vortrag
Dienstag, 1. April 2025, 16:15–16:30, VG 3.102
Measuring the Cosmic Ray Sun Shadow with IceCube* — •Niclas Krieger1,2, Jonas Hellrung1,2, Lukas Merten1,2, Julia Becker Tjus1,2,3, and Paolo Desiati4 for the IceCube collaboration — 1Ruhr-Universität Bochum, Fakultät für Physik und Astronomie, Institut für Theoretische Physik IV, Universitätsstraße 150, 44780 Bochum, Germany — 2Ruhr Astroparticle and Plasma Physics Center (RAPP Center), Bochum, Germany — 3Chalmers University of Technology, Department of Space, Earth and Environment, 412 96 Gothenburg, Sweden — 4Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
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 since this deflects cosmic rays on their way and thus leaves its footprint in the temporal variation of the cosmic-ray shadow with the 11-year solar cycle. In this talk the methods of measuring the shadows of these celestial objects will be reviewed. 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 Neutrino Observatory; Cosmic-ray Sun/Moon shadow; Solar magnetic field; Solar cycle; Atmospheric muons