Journal Article

Anomalous Cosmic Rays and Heliospheric Energetic Particles

Potgieter, M. S., Kóta, J., Giacalone, J., Leske, R. A., Rankin, J. S., Fichtner, H., Florinski, V., Hill, M. E., Fahr, H., Heber, B.

2022

Overview

We present a review of Anomalous Cosmic Rays (ACRs), including the history of their discovery and recent insights into their acceleration and transport in the heliosphere. We focus on a few selected topics including a discussion of mechanisms of their acceleration, escape from the heliosphere, their effects on the dynamics of the heliosheath, transport in the inner heliosphere, and their solar cycle dependence. A discussion concerning their name is also presented towards the end of the review. We note that much is known about ACRs and perhaps the term Anomalous Cosmic Ray is not particularly descriptive to a non specialist. We suggest that the more-general term: “Heliospheric Energetic Particles”, which is more descriptive, for which ACRs and other energetic particle species of heliospheric origin are subsets, might be more appropriate.

• Publisher: Springer Netherlands,Springer Nature B.V
• Subject: Aerospace Technology and Astronautics / Anomalous cosmic rays / Astrophysics and Astroparticles / Cosmic ray showers / Cosmic rays / Energetic particles / Heliosphere / Physics / Physics and Astronomy / Planetology / Solar cycle / Space Exploration and Astronautics / Space Sciences (including Extraterrestrial Physics / The Heliosphere in the Local Interstellar Medium: Into the Unknown