Hybrid origins of the cosmic-ray nuclei spectral hardening at a few hundred GV
arXiv:2107.12289 · doi:10.3847/1538-4357/ac6d5a
Abstract
Many experiments have confirmed the spectral hardening at a few hundred GV of cosmic-ray (CR) nuclei spectra, and three general different origins have been proposed: the primary source acceleration, the propagation, and the superposition of different kinds of sources. The AMS-02 CR nuclei spectra of He, C, N, O, Ne, Mg, Si, and B (which including B and its dominating parents species) are collected to study the necessity of employing a break in diffusion coefficient and independent breaks in primary source injection spectra to reproduce the spectral hardening at a few hundred GV. For comparison, three different schemes are introduced to do the global fitting. The fitting results show that both the break in diffusion coefficient and the independent breaks in primary source injection spectra are needed, which are corresponding to the spatial dependent propagation and the superposition of different kinds of sources, respectively. Consequently, the nuclei spectral hardening in a few hundred GV should have hybrid origins. Moreover, the CR spectral indices of He and Ne show large deviations to other species in low-rigidity region, which indicates their different CR origins.
arXiv comment23 pages, 12 figures, 2 tables. Accepted by ApJ
References in corpus (44)
- emcee: The MCMC Hammer
- Propagation of cosmic-ray nucleons in the Galaxy
- PAMELA Measurements of Cosmic-ray Proton and Helium Spectra
- High-energy particle acceleration in the shell of a supernova remnant
- Secondary antiprotons and propagation of cosmic rays in the Galaxy and heliosphere
- Discrepant hardening observed in cosmic-ray elemental spectra
- Dissipation of Magnetohydrodynamic Waves on Energetic Particles: Impact on Interstellar Turbulence and Cosmic Ray Transport
- Spectral breaks as a signature of cosmic ray induced turbulence in the Galaxy
- Origin of the Cosmic Ray Spectral Hardening
- Models for Galactic cosmic-ray propagation
- Challenging cosmic ray propagation with antiprotons. Evidence for a "fresh" nuclei component?
- Current status and desired accuracy of the isotopic production cross sections relevant to astrophysics of cosmic rays I. Li, Be, B, C, N
- Indications for a high-rigidity break in the cosmic-ray diffusion coefficient
- Inference of the Local Interstellar Spectra of Cosmic Ray Nuclei Z<=28 with the GalProp-HelMod Framework
- Bayesian analysis of spatial-dependent cosmic-ray propagation: astrophysical background of antiprotons and positrons
- Cosmic-ray transport from AMS-02 B/C data: benchmark models and interpretation
- Cosmic-ray protons, nuclei, electrons, and antiparticles under a two-halo scenario of diffusive propagation
- Time-resolved hadronic particle acceleration in the recurrent Nova RS Ophiuchi
- Spatial-Dependent Diffusion of Cosmic Rays and the Ratio of pbar/p, B/C
- Understanding the spectral hardenings and radial distribution of Galactic cosmic rays and Fermi diffuse gamma-rays with spatially-dependent propagation
- Neutron monitors and muon detectors for solar modulation studies: 2. time series
- Deciphering the local Interstellar spectra of secondary nuclei with GALPROP/HelMod framework and a hint for primary lithium in cosmic rays
- Combined analysis of AMS-02 (Li,Be,B)/C, N/O, 3He, and 4He data
- Dark matter or correlated errors: Systematics of the AMS-02 antiproton excess
- Cosmic ray spectral hardening due to dispersion in the source injection spectra
- Fitting B/C cosmic-ray data in the AMS-02 era: A cookbook
- Implications of current nuclear cross sections on secondary cosmic rays with the upcoming DRAGON2 code
- Implications of Lithium to Oxygen AMS-02 spectra on our understanding of cosmic-ray diffusion
- Origin of the Proton-to-Helium Ratio Anomaly in Cosmic Rays
- Revisiting Spatial-Dependent Propagation Model with Latest Observations of Cosmic Ray Nuclei
- Markov chain Monte Carlo analyses of the flux ratios of B, Be and Li with the DRAGON2 code
- Implications on cosmic ray injection and propagation parameters from Voyager/ACE/AMS-02 nucleus data
- Secondary cosmic-ray nucleus spectra disfavor particle transport in the Galaxy without reacceleration
- Nearby source interpretation of differences among light and medium composition spectra in cosmic rays
- Galactic cosmic-ray model in the light of AMS-02 nuclei data
- Implications on the origin of cosmic rays in light of 10 TV spectral softenings
- Spatial Dependent Diffusion of Cosmic Rays and the Excess of Primary Electrons Derived from High Precision Measurements by AMS-02
- Geminga SNR: Possible candidate of local cosmic-ray factory
- On the knee of Galactic cosmic rays in light of sub-TeV spectral hardenings
- Bayesian analysis of the hardening in AMS-02 nuclei spectra
- A Three-component Model for Cosmic-ray Spectrum and Dipole Anisotropy
- Galactic center gamma-ray production by cosmic rays from stellar winds and Sgr A East
- Origin of hardening in spectra of cosmic ray nuclei at a few hundred GeV using AMS-02 data
- Some new hints on cosmic-ray propagation from AMS-02 nuclei spectra
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- Injection spectra of different species of cosmic rays from AMS-02, ACE-CRIS and Voyager-1
- Potential of Constraining Propagation Parameters of Galactic Cosmic Rays with the High Energy cosmic-Radiation Detection facility onboard China's Space Station
- Quantitative study of the hardening in the Alpha Magnetic Spectrometer nuclei spectra at a few hundred GV
- CY Aquarii: A Triple System with Twin Companions