New insights from cross-correlation studies between Solar activity and Cosmic-ray fluxes

TL;DR

This study analyzes how solar magnetic activity influences cosmic-ray intensity over the 11-year solar cycle, using cross-correlation of data from multiple space-based and ground-based experiments to understand particle transport in the heliosphere.

Contribution

It provides a comprehensive cross-correlation analysis of solar activity and cosmic-ray fluxes across different energies and solar cycles, enhancing understanding of solar modulation effects.

Findings

Cosmic-ray intensity varies with solar activity over the solar cycle.

Different cosmic-ray energies show distinct modulation patterns.

Data from multiple sources confirm the solar influence on cosmic-ray fluxes.

Abstract

The observed variability of the cosmic-ray intensity in the interplanetary space is driven by the evolution of the Sun's magnetic activity over its 11-year quasiperiodical cycle. Investigating the relationship between solar activity indices and cosmic-ray intensity measurements is then essential for understanding the fundamental processes of particle transport in the heliosphere. Here we have performed a global characterization the solar modulation of cosmic rays over the solar activity cycle and for different energies of the cosmic particles. We present our cross-correlation studies using data from space experiments, neutron monitors and solar observatories collected over several solar cycles.