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T: Fachverband Teilchenphysik

T 120: Cosmic Ray V

T 120.4: Talk

Thursday, March 23, 2023, 16:35–16:50, POT/0013

Sensitivity of IceCube-Gen2 for Cosmic-Ray Anisotropy Studie — •Wenjie Hou for the IceCube-Gen2 collaboration — Institute for Astroparticle Physics, Karlsruhe Institute of Technology (KIT)

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. One expects to get strong constraints by studying the anisotropy in the cosmic-ray arrival directions. Recently, the cosmic ray anisotropy measurements in the TeV to PeV energy range were updated from IceCube using its 11 years of data. Moreover, IceCube-Gen2 is designed to achieve an exposure about 8 times larger than the IceCube area, as well as more statistics and capability to investigate the cosmic-ray anisotropy with higher sensitivity. The sensitivity of IceCube-Gen2 to anisotropy is in particular a matter of statistics. Taking into account the detector exposure of IceCube-Gen2 and the dipole input, we build a Monte Carlo toy model for IceCube-Gen2 and randomly generate the arrival directions for 10 years of measurements. In this case, the relative intensity maps, significance maps and angular power spectrum can be investigated. More importantly, by scanning the dipole declination and zenith threshold, we can determine under what conditions IceCube-Gen2 could achieve the highest sensitivity to observe the cosmic-ray anisotropy. In general, the current studies on the sensitivity of IceCube-Gen2 for CR anisotropy will also be discussed.