Cosmic Ray Origin - Beyond the Standard Models

TL;DR

This paper discusses the limitations of the standard model of cosmic ray origins, highlighting recent observations that suggest the need for alternative theories beyond Diffusive Shock Acceleration in Supernova Remnants.

Contribution

It reviews the motivation for re-evaluating cosmic ray origins and introduces alternative scenarios beyond the standard DSA model.

Findings

Standard model insufficient for recent observations

Alternative cosmic ray origin scenarios proposed

Need for revised theories in cosmic ray physics

Abstract

Given the success of the first meeting of "Cosmic Ray Origin - Beyond the Standard Models" (CRBTSM 2014), it was decided to hold a second meeting of this international conference. In these introductory remarks, we rehearse the motivation for reconsidering the origin(s) of cosmic rays (CR). We argue that the standard model, in which the majority of Galactic cosmic rays are produced through Diffusive Shock Acceleration (DSA) in SuperNova Remnants (SNR), is insufficient to account for recent observations. Some alternative scenarios are introduced and examined.