Multi-wavelength Signatures of Cosmic Rays in the Milky Way

TL;DR

This paper reviews how multi-wavelength observations and models are used to study cosmic ray properties in the Milky Way, providing insights beyond direct measurements.

Contribution

It combines multi-frequency interstellar emission data with CR measurements and propagation models to improve understanding of cosmic ray behavior.

Findings

Enhanced understanding of cosmic ray spectra and intensities.

Improved propagation models for cosmic rays.

Insights into cosmic ray interactions with the interstellar medium.

Abstract

Cosmic rays (CRs) propagate in the Milky Way and interact with the interstellar medium and magnetic fields. These interactions produce emissions that span the electromagnetic spectrum, and are an invaluable tool for understanding the intensities and spectra of CRs in distant regions, far beyond those probed by direct CR measurements. We present updates on the study of CR properties by combining multi-frequency observations of the interstellar emission and latest CR direct measurements with propagation models.