14–24 Jul 2025
CICG - International Conference Centre - Geneva, Switzerland
Europe/Zurich timezone

All-Sky Cosmic-Ray Anisotropy Update at Multiple Energies

15 Jul 2025, 15:50
15m
Room C

Room C

Talk Cosmic-Ray Indirect CRI

Speaker

Dr Juan Carlos Diaz-Velez (University of Wisconsin-Madison)

Description

We present preliminary results on an updated full-sky analysis of the cosmic-ray arrival direction distribution with data collected by the High-Altitude Water Cherenkov (HAWC) Observatory and IceCube Neutrino Observatory with complementary field of views covering a large fraction of the sky. This study extends the energy range to higher energies. The HAWC Observatory, located at 19°N has analyzed 8 years of cosmic-ray data over an energy range between 3.0 TeV and 1.0 PeV and confirms an energy-dependent anisotropy in the arrival direction distribution of cosmic rays seen by other experiments. Combined with recently published results from IceCube with 12 years of data, the combined sky maps with 93% coverage of the sky —between 70°N and 90°S— and the corresponding angular power spectra largely eliminate biases that result from partial sky coverage.

Collaboration(s) HAWC, IceCube

Authors

Dr Juan Carlos Diaz-Velez (University of Wisconsin-Madison) Paolo Desiati (University of Wisconsin - Madison) Riya Yogesh Kore (University of Wisconsin-Madison)

Presentation materials