Cosmic Ray Anisotropy with 11 Years of IceCube Data
Abstract
The IceCube Observatory provides our highest-statistics picture of the cosmic-ray arrival directions in the Southern Hemisphere, with over 700 billion cosmic-ray-induced muon events collected between May 2011 and May 2022. Using the larger data volume, we find an improved significance of the PeV cosmic ray anisotropy down to scales of . In addition, we observe a variation in the angular power spectrum as a function of energy, hinting at a relative decrease in large-scale features above 100 TeV. The data-taking period covers a complete solar cycle, providing new insight into the time variability of the signal. We present preliminary results using this up-to-date event sample.
Keywords
Cite
@article{arxiv.2308.02331,
title = {Cosmic Ray Anisotropy with 11 Years of IceCube Data},
author = {Frank McNally and Rasha Abbasi and Paolo Desiati and Juan Carlos Díaz Vélez and Christina Cochling and Katherine Gruchot and William Hayes and Andrew Moy and Emily Schmidt and Andrew Thorpe},
journal= {arXiv preprint arXiv:2308.02331},
year = {2023}
}
Comments
Presented at the 38th International Cosmic Ray Conference (ICRC2023). See arXiv:2307.13047 for all IceCube contributions