Examining Temporal Characteristics of GCRs in the AMS-02 era
astro-ph.HE
Submitted: 2026-09-12
Updated: 2026-10-08
Comments: 16 pages, 9 figures, accepted by ApJ
License: http://creativecommons.org/licenses/by/4.0/
The gist: The energy spectra of Galactic cosmic rays (GCRs) serve as critical probes of their astrophysical origins and propagation mechanisms through the interstellar medium.
Terminology
Abstract
The energy spectra of Galactic cosmic rays (GCRs) serve as critical probes of their astrophysical origins and propagation mechanisms through the interstellar medium. Among the key physical processes shaping the observed spectra, solar modulation, driven by turbulent heliospheric magnetic fields and the variability of the solar wind, plays a dominant role in modifying GCR fluxes within the inner heliosphere. The recent release of time-dependent flux measurements for He, Li, Be, B, C, N, and O by AMS-02 provides unprecedented precision to investigate solar modulation phenomena. In this study, we demonstrate that Li, Be, B, C, N, and O nuclei exhibit solar modulation parameters consistent with those of protons (p) and He within a modified force-field approximation (FFA) framework incorporating rigidity-dependent modulation potentials. By positing that GCRs with the same charge-sign sharing the solar modulation parameters, we further forecast daily fluxes of Ne, Mg and Si from 2011 to 2020.
Related papers
- Numerical Studies of Accretion Flows onto a Neutron Star Engulfed in a Massive Star
- Collisionless Accretion of Finite-Angular-Momentum Plasma onto a Spinning Black Hole
- Impact of Magnetic Field Topology on Electromagnetic and Gravitational Waves from Binary Neutron Star Merger Remnants
- XRISM Resolve Spectroscopy of GX 5-1: Constraints on Iron Spectral Features in a Luminous Neutron-Star Binary
- SN 1006: A Cosmic Laboratory for Investigating Shock Acceleration Physics
- Neutrino Spectral Pinching in 3D Core-Collapse Supernovae: Late-Time Convergence, Failed-Explosion Signatures, and Viewing-Angle Dispersion