Estimative of conversion fractions of AGN magnetic luminosity to produce ultra high energy cosmic rays from the observation of Fermi-LAT gamma rays

2017 ◽  
Author(s):  
Carlos H. Coimbra-Araújo ◽  
Rita C. Anjos
Keyword(s):  
Cosmic Rays ◽  
Gamma Rays ◽  
High Energy ◽  
Ultra High Energy ◽  
High Energy Cosmic Rays

scholarly journals Ultra High Energy Cosmic Rays: Origin, Composition and Spectrum

2019 ◽  
Vol 209 ◽  
pp. 01018
Author(s):  
Roberto Aloisio
Keyword(s):  
Cosmic Rays ◽  
Gamma Rays ◽  
Theoretical Models ◽  
High Energy ◽  
Experimental Results ◽  
Mass Composition ◽  
Ultra High Energy ◽  
High Energy Cosmic Rays ◽  
Secondary Particles

The physics of Ultra High Energy Cosmic Rays will be reviewed, discussing the latest experimental results and theoretical models aiming at explaining the observations in terms of spectra, mass composition and possible sources. It will be also discussed the emission of secondary particles such as neutrinos and gamma rays produced by the interaction of Ultra High Energy Cosmic Rays with astrophysical photon backgrounds. The content of the present proceeding paper is mainly based on the review papers [1, 2].

scholarly journals ULTRA HIGH ENERGY COSMIC RAYS: ORIGIN AND PROPAGATION

2010 ◽  
Vol 25 (18) ◽  
pp. 1467-1481 ◽  
Author(s):  
TODOR STANEV
Keyword(s):  
Cosmic Rays ◽  
Gamma Rays ◽  
Cosmic Ray ◽  
High Energy ◽  
Ultra High Energy ◽  
Ultrahigh Energy ◽  
High Energy Cosmic Rays ◽  
Astrophysical Objects ◽  
Ultrahigh Energy Cosmic Rays ◽  
The Universe

We introduce the highest energy cosmic rays and briefly review the powerful astrophysical objects where they could be accelerated. We then introduce the interactions of different cosmic ray particles with the photon fields of the Universe and the formation of the cosmic ray spectra observed at Earth. The last topic is the production of secondary gamma rays and neutrinos in the interactions of the ultrahigh energy cosmic rays.

scholarly journals Radio detection in the multi-messenger context

2019 ◽  
Vol 207 ◽  
pp. 03005
Author(s):  
D. Kostunin
Keyword(s):  
Cosmic Rays ◽  
Gamma Rays ◽  
Cosmic Radiation ◽  
High Energy ◽  
Ultra High Energy ◽  
Future Prospects ◽  
Air Showers ◽  
Digital Radio ◽  
High Energy Cosmic Rays ◽  
Radio Detection

The present work discusses the development of the radio technique for detection of ultra-high energy air-showers induced by cosmic radiation, and the prospects of its application in the future multi-messenger activities, particularly for detection of ultra-high energy cosmic rays, gamma rays and neutrinos. It gives an overview of the results achieved by the modern digital radio arrays, as well as discuss present challenges and future prospects.

scholarly journals The GRAND project and GRANDProto300 experiment

2019 ◽  
Vol 210 ◽  
pp. 06007
Author(s):  
Olivier Martineau-Huynh
Keyword(s):  
Cosmic Rays ◽  
Gamma Rays ◽  
High Energy ◽  
Point Sources ◽  
Ultra High Energy ◽  
Air Showers ◽  
High Energy Cosmic Rays ◽  
Complete Measurement ◽  
Neutrino Astronomy ◽  
The Universe

The Giant Array for Neutrino Detection (GRAND) is a proposal for a giant observatory of ultra-high energy cosmic particles (neutrinos, cosmic rays and gamma rays). It will be composed of twenty subarrays of 10 000 antennas each, totaling a detection area of 200 000 km2. GRAND will reach unprecedented sensitivity to neutrinos allowing to detect cosmogenic neutrinos while its sub-degree angular resolution will also make it possible to hunt for point sources and possibly start neutrino astronomy. Combined with its gigantic exposure to ultra-high energy cosmic rays and gamma rays, GRAND will be a powerful tool to solve the century-long mistery of the nature and origin of the particles with highest energy in the Universe. On the path to GRAND, the GRANDProto300 experiment will be deployed in 2020 over a total area of 200 km2. It primarly aims at validating the detection concept of GRAND, but also proposes a rich science program centered on a precise and complete measurement of the air showers initiated by cosmic rays with energies between 1016.5 and 1018 eV, a range where we expect to observe the transition between the Galactic and extra-galactic origin of cosmic rays.

scholarly journals Ultra-high energy cosmic rays and prompt TeV gamma rays from gamma ray bursts

Pramana ◽  
2004 ◽  
Vol 62 (3) ◽  
pp. 789-792
Author(s):  
Pijushpani Bhattacharjee ◽  
Nayantara Gupta
Keyword(s):  
Cosmic Rays ◽  
Gamma Rays ◽  
Gamma Ray ◽  
High Energy ◽  
Gamma Ray Bursts ◽  
Ultra High Energy ◽  
High Energy Cosmic Rays ◽  
Tev Gamma Rays

scholarly journals A Search for Correlations of TeV Gamma Rays with Ultra–High‐Energy Cosmic Rays

2003 ◽  
Vol 586 (2) ◽  
pp. 1232-1237 ◽  
Author(s):  
C. W. Akerlof ◽  
S. Biller ◽  
P. Boyle ◽  
J. Buckley ◽  
D. A. Carter‐Lewis ◽  
...  
Keyword(s):  
Cosmic Rays ◽  
Gamma Rays ◽  
High Energy ◽  
Ultra High Energy ◽  
High Energy Cosmic Rays ◽  
Tev Gamma Rays
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