Anomalous Cosmic Rays and Heliospheric Energetic Particles
Abstract
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.
Additional Information
© The Author(s) 2022. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. Accepted: 4 April 2022. We are grateful to the International Space Science Institute for their organization, hosting, and support of the workshop "The Heliosphere in the Local Interstellar Medium", made especially challenging due to the coronavirus pandemic. JG acknowledges partial travel support to attend the meeting from USRA/Lunar and Planetary Institute. JG also acknowledges support from NASA grant 18-DRIVE18_2-0029 as part of the NASA/DRIVE program titled "Our Heliospheric Shield", and from NASA's Interstellar Mapping and Acceleration Probe (IMAP) under NASA contract 80GSFC19C0027. Open Access funding enabled and organized by Projekt DEAL.Attached Files
Published - s11214-022-00890-7.pdf
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Additional details
- PMCID
- PMC9046724
- Eprint ID
- 114825
- Resolver ID
- CaltechAUTHORS:20220520-648897000
- Universities Space Research Association
- Lunar and Planetary Institute
- 18-DRIVE18_2-0029
- NASA
- 80GSFC19C0027
- NASA
- Projekt DEAL
- Created
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2022-05-20Created from EPrint's datestamp field
- Updated
-
2022-05-25Created from EPrint's last_modified field
- Caltech groups
- Space Radiation Laboratory