Multi messenger astronomy and CTA: TeV cosmic rays and electrons

TL;DR

This paper reviews recent measurements of cosmic-ray nuclei and electrons in the TeV range, discussing experimental challenges and their implications for understanding cosmic-ray origins and propagation.

Contribution

It provides a comprehensive analysis of recent experimental data on cosmic-ray electrons and nuclei, highlighting the challenges and uncertainties involved.

Findings

Recent measurements extend into the TeV energy range.

Electrons offer unique insights into cosmic-ray origins.

Experimental uncertainties remain significant.

Abstract

Cosmic rays are a sample of solar, galactic and extragalactic matter. Their origin and properties are one of the most intriguing question in modern astrophysics. The most energetic events and active objects in the Universe: supernovae explosion, pulsars, relativistic jets, active galactic nuclei, have been proposed as sources of cosmic rays although unambiguous evidences have still to be found. Electrons, while comprising ~1% of the cosmic radiation, have unique features providing important information regarding the origin and propagation of cosmic rays in the Galaxy that is not accessible from the study of the cosmic-ray nuclear components due to their differing energy-loss processes. In this paper we will analyse, discussing the experimental uncertainties and challenges, the most recent measurements on cosmic-ray nuclei and, in particular, electrons with energies from tens of GeV into the TeV region.