PreprintCC BY-NC-ND 4.0arXiv
A new view of the cosmic-ray knee after LHAASO
Abstract
Recent LHAASO measurements offer a new view of the cosmic-ray knee by combining the all-particle spectrum and mean logarithmic mass with proton and light-component spectra across the PeV region. This contribution reviews these results and their implications for Galactic acceleration and transport. Approximately charge-ordered proton and helium knees coexist with different spectral evolution, while their turnover shapes constrain source populations and escape mechanisms. These measurements anchor an elemental ``ladder'' that, extended to heavier nuclei, will be crucial for establishing how far the Galactic component persists and where the Galactic--extragalactic transition takes place.
Related
- From DAMPE to LHAASO: Rigidity Scales and Composition Changes in Galactic Cosmic Rays
- Caught by its own light: Wimpzillas, the LHAASO knee and the diffuse γ-ray sky
- Elemental cosmic ray spectra reveal two populations of Galactic sources and an immediate transition to an extragalactic component after the knee
- LHAASO Constraints on New-Source Cosmic Rays:Abundance Scenarios and Injection Spectral Indices
- A HINSA view of cosmic-ray ionization in IC 348 and NGC 1333: evidence for a strong low-energy cosmic-ray disparity
BibTeX
@misc{evoli2026view,
title = {{A new view of the cosmic-ray knee after LHAASO}},
author = {Carmelo Evoli},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.28751},
eprint = {2610.28751},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.28751},
note = {CC BY-NC-ND 4.0},
}
RIS
TY - UNPB
TI - A new view of the cosmic-ray knee after LHAASO
AU - Carmelo Evoli
PY - 2026
DA - 2026/10/20
PB - arXiv
DO - 10.48550/arxiv.2610.28751
UR - https://arxiv.org/abs/2610.28751
AB - Recent LHAASO measurements offer a new view of the cosmic-ray knee by combining the all-particle spectrum and mean logarithmic mass with proton and light-component spectra across the PeV region. This contribution reviews these results and their implications for Galactic acceleration and transport. Approximately charge-ordered proton and helium knees coexist with different spectral evolution, while their turnover shapes constrain source populations and escape mechanisms. These measurements anchor an elemental ``ladder'' that, extended to heavier nuclei, will be crucial for establishing how far the Galactic component persists and where the Galactic--extragalactic transition takes place.
ER -