Estimate of the chemical composition of cosmic rays from a multifractal moments analysis of the lateral particle distributions in the core of high-energy EAS

1997 ◽  
Vol 52 (3) ◽  
pp. 169-171
Author(s):  
A. Haungs ◽  
J. Kempa ◽  
H.-J. Mathes ◽  
H. Rebel ◽  
J. Wentz
Keyword(s):  
Chemical Composition ◽  
Cosmic Rays ◽  
High Energy ◽  
Particle Distributions ◽  
The Core

scholarly journals CONSTRAINTS ON THE SOURCE OF ULTRA-HIGH-ENERGY COSMIC RAYS USING ANISOTROPY VERSUS CHEMICAL COMPOSITION

2013 ◽  
Vol 776 (2) ◽  
pp. 88 ◽  
Author(s):  
Ruo-Yu Liu ◽  
Andrew M. Taylor ◽  
Martin Lemoine ◽  
Xiang-Yu Wang ◽  
Eli Waxman
Keyword(s):  
Chemical Composition ◽  
Cosmic Rays ◽  
High Energy ◽  
Ultra High Energy ◽  
High Energy Cosmic Rays

The chemical composition of energetic charged particles in interplanetary space

1980 ◽  
Vol 297 (1433) ◽  
pp. 621-627
Keyword(s):  
Chemical Composition ◽  
Cosmic Rays ◽  
Solar Flare ◽  
Charge State ◽  
Interplanetary Space ◽  
Charged Particles ◽  
High Energy ◽  
Galactic Cosmic Rays ◽  
Ionic Charge ◽  
Particle Population

The particle population in the heliosphere is briefly reviewed. Next the chemical composition of the charged fraction is reviewed by discussing three classes. The galactic cosmic rays and high energy solar flare particles above 100 MeV/nucleon are mentioned. The anomalous component in the range 1-100 MeV/nucleon, prompt solar flare particles, energetic storm particles and corotating events are discussed. The anomalous variations in isotopic ( 3 He) and chemical composition (iron-rich events) at energies below 10 MeV are reviewed. A discussion on the ionic charge state of these particles concludes this overview.

scholarly journals High-Energy Cosmic Rays from Radio Galaxies

2019 ◽  
Vol 210 ◽  
pp. 04001
Author(s):  
Björn Eichmann
Keyword(s):  
Chemical Composition ◽  
Cosmic Rays ◽  
Radio Galaxies ◽  
High Energy ◽  
High Energy Cosmic Rays ◽  
Cygnus A ◽  
Strong Source ◽  
Average Contribution ◽  
Centaurus A

A detailed investigation of radio galaxies has recently stressed these sources as the possible origin of the cosmic rays observed above 3 EeV. Here, the relevance of this model at energies below 3 EeV is investigated. It is shown that the average contribution of radio galaxies can accurately explain the observed CR flux between the second knee and the ankle in the case of a strong source evolution. However, the model cannot provide the increasing heaviness and variance at energies ≲ 1 EeV of the observed chemical composition. In addition, it is exposed that the resulting variance of the chemical composition at Earth shows also at higher energies a clear disagreement with the observations, indicating that the compositional contributions by Centaurus A and Cygnus A need to be less different.

scholarly journals High Energy Cosmic Rays from Young Neutron Stars

1987 ◽  
Vol 125 ◽  
pp. 554-554
Author(s):  
Shigeki Miyaji
Keyword(s):  
Chemical Composition ◽  
Cosmic Rays ◽  
Energy Range ◽  
Neutron Stars ◽  
Cosmic Ray ◽  
High Energy ◽  
Heavy Nuclei ◽  
Intensity Enhancement ◽  
High Energy Cosmic Rays ◽  
High Energies

Cosmic ray spectrum has an intensity enhancement at energy range 1014–16 eV/nuc. Recently Takahasi et al. (1986) called an attention to chemical composition there. Although the data still contain large uncertainties, they argued an overabundance of calcium at high energies (Ca/Fe ≥ 2 above 1014 eV/nucleus) and some enhancements of medium heavy nuclei (C ∼ Ar) instead of no anomalous p, He, and Fe abundances.

MULTI-MESSENGER ASTRONOMY WITH CENTAURUS A

2009 ◽  
Vol 18 (10) ◽  
pp. 1591-1595 ◽  
Author(s):  
M. KACHELRIEß ◽  
S. OSTAPCHENKO ◽  
R. TOMÀS
Keyword(s):  
Cosmic Rays ◽  
High Energy ◽  
Shock Acceleration ◽  
Primary Proton ◽  
Ultrahigh Energy ◽  
High Energy Part ◽  
Hadronic Interactions ◽  
High Energy Cosmic Rays ◽  
The Core ◽  
Centaurus A

We calculated for the nearest active galactic nucleus (AGN), Centaurus A (Cen A), the flux of high energy cosmic rays and of accompanying secondary photons and neutrinos expected from hadronic interactions in the source. We used as two basic models for the generation of ultrahigh energy cosmic rays (UHECR) shock acceleration in the radio jet and acceleration in the regular electromagnetic field close to the core of the AGN, normalizing the UHECR flux to the observations of the Auger experiment. Here we compare the previously obtained photon fluxes with the recent data reported by the Fermi LAT and H.E.S.S. collaborations. In the case of the core model, we find good agreement both for the predicted spectral shape and the overall normalization between our earlier results and the H.E.S.S. observations for a primary proton energy dN/dE ∝ E-α with α ~ 2 or smaller. A broken power law with high-energy part α = -2.7 leads to photon fluxes in excess of the Fermi measurements. The energy spectrum of the photon fluxes obtained by us for the jet scenario is in all cases at variance with the H.E.S.S. and Fermi observations.

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