scholarly journals All-sky search for correlations in the arrival directions of astrophysical neutrino candidates and ultrahigh-energy cosmic rays

2017 ◽  
Author(s):  
Imen Al Samarai ◽  
Geraldina Golup ◽  
◽  
◽  
Keyword(s):  
Cosmic Rays ◽  
Ultrahigh Energy ◽  
Ultrahigh Energy Cosmic Rays ◽  
Astrophysical Neutrino ◽  
Arrival Directions

scholarly journals Arrival Directions of Ultrahigh-Energy Cosmic Rays

2019 ◽  
Vol 1208 ◽  
pp. 012013
Author(s):  
Alan G. Chávez-Meza ◽  
Juan C. Arteaga-Velázquez ◽  
Luis M. Villaseñor-Cendejas
Keyword(s):  
Cosmic Rays ◽  
Ultrahigh Energy ◽  
Ultrahigh Energy Cosmic Rays ◽  
Arrival Directions

scholarly journals Superheavy dark matter and ultrahigh-energy cosmic rays

2006 ◽  
Vol 84 (6-7) ◽  
pp. 537-543
Author(s):  
R Dick ◽  
K M Hopp ◽  
K E Wunderle
Keyword(s):  
Dark Matter ◽  
Cosmic Rays ◽  
Early Universe ◽  
Cosmic Ray ◽  
Pierre Auger Observatory ◽  
Ultrahigh Energy ◽  
Mass Window ◽  
Ultrahigh Energy Cosmic Rays ◽  
Superheavy Dark Matter ◽  
Arrival Directions

The phase of inflationary expansion in the early Universe produces superheavy relics in a mass window between 1012 and 1014 GeV. Decay or annihilation of these superheavy relics an explain the observed ultrahigh-energy cosmic rays beyond the Greisen–Zatsepin–Kuzmin cutoff. We emphasize that the pattern of cosmic-ray arrival directions seen by the Pierre Auger observatory will decide between the different proposals for the origin of ultrahigh-energy cosmic rays.PACS Nos.: 98.70.Sa, 98.70.–f, 95.35.+d, 14.80.–j

scholarly journals Filaments of galaxies as a clue to the origin of ultrahigh-energy cosmic rays

2019 ◽  
Vol 5 (1) ◽  
pp. eaau8227 ◽  
Author(s):  
Jihyun Kim ◽  
Dongsu Ryu ◽  
Hyesung Kang ◽  
Suk Kim ◽  
Soo-Chang Rey
Keyword(s):  
Cosmic Rays ◽  
Magnetic Fields ◽  
Virgo Cluster ◽  
Ultrahigh Energy ◽  
High Concentration ◽  
Telescope Array ◽  
Ultrahigh Energy Cosmic Rays ◽  
To Come ◽  
Binomial Statistics ◽  
Arrival Directions

Ultrahigh-energy cosmic rays (UHECRs) are known to come from outside of our Galaxy, but their origin still remains unknown. The Telescope Array (TA) experiment recently identified a hotspot, that is, a high concentration of anisotropic arrival directions of UHECRs with energies above 5.7 Å ~ 1019eV. We report here the presence of filaments of galaxies, connected to the Virgo Cluster, in the sky around the hotspot and a statistically significant correlation between hotspot events and the filaments. With 5-year TA data, the maximum significance of binomial statistics for the correlation is estimated to be 6.1σ at correlation angle 3.4°. The probability that the above significance appears by chance is ~2.0 × 10−8(5.6σ). On the basis of this finding, we suggest a model for the origin of TA hotspot UHECRs; they are produced at sources in the Virgo Cluster, and escape to and propagate along filaments, before they are scattered toward us. This picture requires the filament magnetic fields of strength ≳ 20 nG, which need to be confirmed in future observations.

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