Origin of cosmic rays and evolution of spallogenic nuclides Li, Be and B

TL;DR

This paper reviews the production and evolution of Li, Be, and B in the Milky Way, proposing a new model where cosmic rays originate from stellar wind material, affecting their observed evolution.

Contribution

It introduces a novel idea that Galactic Cosmic Rays are accelerated from stellar wind material of rotating massive stars, offering a new perspective on their role in nuclide production.

Findings

Reassesses the primary-like evolution of Be in the galaxy.

Provides estimates of various sources contributing to solar Li abundance.

Highlights uncertainties in pre-galactic Li levels.

Abstract

A short overview is presented of current issues concerning the production and evolution of Li, Be and B in the Milky Way. In particular, the observed "primary-like" evolution of Be is re-assessed in the light of a novel idea: it is argued that Galactic Cosmic Rays are accelerated from the wind material of rotating massive stars, hit by the forward shock of the subsequent supernova explosions. The pre-galactic levels of both Li isotopes remain controversial at present, making it difficult to predict their Galactic evolution. A quantitative estimate is provided of the contributions of various candidate sources to the solar abundance of Li.