Forecasting of the Time-dependent Fluxes of Antiprotons in the AMS-02 Era

The spectra of Galactic cosmic rays (GCRs) contain crucial information about their origin and propagation through the interstellar medium. When GCRs reach Earth, they are significantly influenced by the solar wind and the heliospheric magnetic field, a phenomenon known as solar modulation. This effe...

Full description

Saved in:
Bibliographic Details
Published in:The Astrophysical journal Vol. 982; no. 2; pp. 103 - 109
Main Authors: Zhu, Cheng-Rui, Duan, Kai-Kai
Format: Journal Article
Language:English
Published: Philadelphia The American Astronomical Society 01.04.2025
IOP Publishing
Subjects:
Antiparticles
Antiprotons
Cosmic ray showers
Cosmic rays
Electron flux
Galactic cosmic rays
Heliosphere
Heliospheric magnetic field
Helium
Interstellar matter
Interstellar medium
Magnetic fields
Modulation
Nuclei (nuclear physics)
Parameter modification
Positrons
Protons
Solar wind
Time dependence
ISSN:0004-637X, 1538-4357
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The spectra of Galactic cosmic rays (GCRs) contain crucial information about their origin and propagation through the interstellar medium. When GCRs reach Earth, they are significantly influenced by the solar wind and the heliospheric magnetic field, a phenomenon known as solar modulation. This effect introduces time-dependent variations in GCR fluxes. The AMS-02 experiment has released time-dependent flux data for protons, electrons, and positrons, revealing clear correlations with solar modulation. Studies suggest that cosmic rays with the same charge, such as protons and helium nuclei, exhibit similar or the same solar modulation parameters. In this work, we derive the local interstellar spectrum (LIS) for protons and positrons under the assumption of a common solar modulation potential, using data from Voyager 1 and a 7 yr average from AMS-02. Similarly, the LIS for antiprotons and electrons is derived by assuming they are governed by a separate solar modulation potential. We demonstrate that the time-dependent fluxes of positrons and protons can be accurately modeled using the same set of solar modulation parameters within a modified force-field approximation framework. Based on this, we predict the time-dependent fluxes of antiprotons using the corresponding electron flux data.
Bibliography:High-Energy Phenomena and Fundamental Physics
AAS62028
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
ISSN:0004-637X
1538-4357
DOI:10.3847/1538-4357/adbaf1