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 Magnetic deflections of ultra-high energy cosmic rays from Centaurus A

2015 ◽  
Vol 61 ◽  
pp. 47-55 ◽  
Author(s):  
Azadeh Keivani ◽  
Glennys R. Farrar ◽  
Michael Sutherland
Keyword(s):  
Cosmic Rays ◽  
High Energy ◽  
Ultra High Energy ◽  
High Energy Cosmic Rays ◽  
Centaurus A

scholarly journals A STUDY ON ANISOTROPY IN THE ARRIVAL DIRECTIONS OF ULTRA-HIGH-ENERGY COSMIC RAYS OBSERVED BY PIERRE AUGER OBSERVATORY

2013 ◽  
Vol 28 (18) ◽  
pp. 1350075
Author(s):  
HANG BAE KIM
Keyword(s):  
Cosmic Rays ◽  
High Energy ◽  
Angular Distance ◽  
Pierre Auger Observatory ◽  
South Pole ◽  
Ultra High Energy ◽  
Background Contribution ◽  
High Energy Cosmic Rays ◽  
Centaurus A ◽  
Arrival Directions

We study the anisotropy in the arrival directions of Pierre Auger Observatory (PAO) ultra-high-energy cosmic rays (UHECRs), using the point source correlational angular distance distribution (CADD). The result shows that the anisotropy is characterized by one prominent excess region and one void region. The excess region is located near the Centaurus A direction, supporting that the Centaurus A is a promising UHECR source. The void region near the south pole direction may be used to limit the diffuse isotropic background contribution.

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

scholarly journals All-sky catalog of local radio galaxies

2012 ◽  
Vol 8 (S295) ◽  
pp. 271-271
Author(s):  
S. van Velzen ◽  
H. Falcke
Keyword(s):  
Black Hole ◽  
Cosmic Rays ◽  
Galaxy Formation ◽  
Causal Relation ◽  
Radio Galaxies ◽  
High Energy ◽  
Local Universe ◽  
High Energy Cosmic Rays ◽  
Normal Galaxies ◽  
Radio Jets

AbstractThe final episode in the history of black hole accretion and galaxy formation takes place in our cosmic backyard, the local universe. Within this volume must also reside the — until now unknown — sources of observed ultra-high energy cosmic rays (UHECRs). A thorough study of the local universe requires full-sky coverage to obtain a sizable sample and map the matter anisotropy. We recently constructed the first catalog of radio-emitting galaxies that meets this requirement. The sample contains all radio galaxies similar to Centaurus~A out to ~100 Mpc. Only 3% of the hosts of the powerful radio jets are classified as Spiral galaxies, while for non-radio galaxies of similar mass, this fraction is 34%. The energy injected by radio jets per unit volume indicates that Cen A-like radio galaxies have in principle sufficient power to accelerate cosmic rays to ultra-high energies. A significantly enhanced clustering of radio-loud galaxies compared to normal galaxies of the same luminosity is observed. This indicates a causal relation between galaxy environment and jet power, independent of black hole mass.

scholarly journals ON THE EXCESS OF ULTRA-HIGH ENERGY COSMIC RAYS IN THE DIRECTION OF CENTAURUS A

2012 ◽  
Vol 755 (2) ◽  
pp. 139 ◽  
Author(s):  
Ruo-Yu Liu ◽  
Xiang-Yu Wang ◽  
Wei Wang ◽  
Andrew M. Taylor
Keyword(s):  
Cosmic Rays ◽  
High Energy ◽  
Ultra High Energy ◽  
High Energy Cosmic Rays ◽  
Centaurus A

scholarly journals ULTRA-HIGH-ENERGY COSMIC RAYS FROM CENTAURUS A: JET INTERACTION WITH GASEOUS SHELLS

2010 ◽  
Vol 720 (2) ◽  
pp. L155-L158 ◽  
Author(s):  
Gopal-Krishna ◽  
Peter L. Biermann ◽  
Vitor de Souza ◽  
Paul J. Wiita
Keyword(s):  
Cosmic Rays ◽  
High Energy ◽  
Ultra High Energy ◽  
Jet Interaction ◽  
High Energy Cosmic Rays ◽  
Centaurus A
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