Data driven analysis of Galactic cosmic rays in the heliosphere: diffusion of cosmic protons and nuclei

TL;DR

This paper analyzes how galactic cosmic ray fluxes within the heliosphere vary over the solar cycle by statistically inferring diffusion parameters from space-based measurements, shedding light on particle transport processes.

Contribution

It introduces a data-driven approach to quantify the temporal and rigidity dependence of GCR diffusion parameters using multi-mission space data.

Findings

GCR diffusion parameters vary with time and rigidity.

Results link particle transport to heliospheric plasma dynamics.

Provides insights into solar modulation effects on cosmic rays.

Abstract

Galactic cosmic rays (GCRs) inside the heliosphere are affected by magnetic turbulence and Solar wind disturbances which result in the so-called solar modulation effect. To investigate this phenomenon, we have performed a data-driven analysis of the temporal dependence of the GCR flux over the solar cycle. With a global statistical inference of GCR data collected in space by AMS-02, PAMELA, and CRIS on monthly basis, we have determined the dependence of the GCR diffusion parameters upon time and rigidity. In this conference, we present our results for GCR protons and nuclei, we discuss their interpretation in terms of basic processes of particle transport and their relations with the dynamics of the heliospheric plasma.