PoS - Proceedings of Science
Volume 395 - 37th International Cosmic Ray Conference (ICRC2021) - CRD - Cosmic Ray Direct
Study Of Cosmic Ray Spectral Hardening Using GALPROP
Presented by H. Wu*  on behalf of E.S. Seo and V. Ptuskin
Full text: pdf
Pre-published on: July 30, 2021
Published on: March 18, 2022
Significant spectral hardening at around 200 GV magnetic rigidity has been reported by AMS-02, ATIC-2, CALET, CREAM, DAMPE, and PAMELA. This has been observed in high-accuracy measurements of various nuclei energy spectra of both primaries and secondaries. To explain the spectral hardening while maintaining proper B/C and p/He ratios, we study 3 approaches in a reacceleration model: adding a diffusion coefficient break, introducing extra source injection breaks, and a combination of both. We use the numerical code GALPROP to compute the propagation of cosmic rays with such parameter sets on the rigidity dependence of source and propagation parameters. Implications on the positron spectra are discussed.
DOI: https://doi.org/10.22323/1.395.0155
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