Heidelberg 2022 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 100: Cosmic Ray 5

T 100.5: Vortrag

Donnerstag, 24. März 2022, 17:15–17:30, T-H32

Sensitivity of IceCube-Gen2 for High-Energy Cosmic Ray Anisotropy Studies — •Wenjie Hou and Donghwa Kang for the IceCube collaboration — Institute for Astroparticle Physics, Karlsruhe Institute of Technology (KIT), Karlsruhe

At which energy the transition from galactic to extra-galactic cosmic rays (CRs) takes place is one of the major unresolved issues of cosmic ray physics. Although the sources of high-energy cosmic rays remain unknown, one expects to identify them by studying the anisotropy in their arrival directions. Recently, the cosmic ray anisotropy measurements in TeV to PeV energy range were updated from IceCube using its nine years of data. IceCube-Gen2 is designed to have a detector volume about 8 times larger than IceCube and will achieve an increased exposure to cosmic rays by a factor of 30. This improvement could allow us to obtain high-quality measurements of cosmic ray air showers and investigate the cosmic ray anisotropy with higher sensitivity.

The sensitivity of IceCube-Gen2 to anisotropy is purely a matter of statistics. Hence, based on the simulation of IceCube-Gen2, the first attempt is to make an exposure map taking into account detection efficiency and resolution. We will build a Monte Carlo toy simulation model of IceCube-Gen2. In this case, the expected maps will be generated with random events, resulting in the angular power spectrum. Eventually, we can determine under what conditions IceCube-Gen2 could achieve the highest sensitivity to observe cosmic ray anisotropy. In this contribution, the current studies on the anisotropy with the simulation will be discussed.