Rapporteur Talk: Cosmic Ray Direct

TL;DR

This report summarizes recent observational and theoretical advances in understanding Galactic cosmic rays, including new space-borne data, models of acceleration, and their effects on the Galaxy, as presented at ICRC 2021.

Contribution

It provides a comprehensive overview of recent experimental data, theoretical models, and future experimental prospects related to Galactic cosmic rays.

Findings

New space-borne measurements of CR electrons, positrons, and nuclei.

Models of CR acceleration and Galactic feedback discussed.

Insights into CR spectra, anisotropies, and diffuse gamma-ray emission.

Abstract

This is the report on the cosmic ray direct track of the 37th International Cosmic Ray Conference (ICRC 2021), broadly covering the contributions relating to charged cosmic rays (CRs) of Galactic origin. The contributions highlighted here are of both observational and theoretical nature and aim at interpreting the local fluxes of CRs as well as studying the wider dynamical effects of CRs. New data from space-borne experiments on CR electrons and positrons, proton and helium as well as heavier nuclei and their isotopes are reviewed. We cover some models of CR acceleration and their feedback on Galactic scales. Diffuse emission in gamma-rays as far as it concerns the CR spectra in the immediate vicinity of the solar system and CR anisotropies are covered briefly. Some upcoming and proposed experiments are highlighted towards the end.