# Supernova Remnant-Cosmic Ray connection: a modern view

## TL;DR

This paper reviews recent high-precision cosmic ray data from AMS-02, PAMELA, and Fermi-LAT, highlighting their implications for supernova remnants as the primary sources of cosmic rays and revealing complex phenomena that challenge existing theories.

## Contribution

It provides a comprehensive overview of how new observational data influence the supernova remnant paradigm for cosmic ray origins, emphasizing recent advancements in acceleration, escape, and propagation processes.

## Key findings

- New data reveal more complex cosmic ray phenomenology.
- Observations challenge traditional supernova remnant models.
- Progress in understanding cosmic ray acceleration and escape.

## Abstract

The Cosmic Ray (CR) physics has entered a new era driven by high precision measurements coming from direct detection (especially AMS-02 and PAMELA) and also from gamma-ray observations (Fermi-LAT). In this review we focus our attention on how such data impact the understanding of the supernova remnant paradigm for the origin of CRs. In particular we discuss advancement in the field concerning the three main stages of the CR life: the acceleration process, the escape from the sources and the propagation throughout the Galaxy. We show how the new data reveal a phenomenology richest than previously thought that could even challenge the current understanding of CR origin.