Results 31 to 40 of about 73,503 (266)
Cosmic rays in a galactic breeze [PDF]
Physical Review D, 2017 Motivated by the discovery of the non-thermal Fermi bubble features both below and above the Galactic plane, we investigate a scenario in which these bubbles are formed through Galacto-centric outflow. Cosmic rays (CR) both diffusing and advecting within a Galactic breeze outflow, interacting with the ambient gas present, give rise to gamma-ray ...
Taylor, A., Giacinti, G.
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GALACTIC AND EXTRAGALACTIC SUPERNOVA REMNANTS AS SITES OF PARTICLE ACCELERATION
Acta Polytechnica, 2013 Supernova remnants, owing to their strong shock waves, are likely sources of Galactic cosmic rays. Studies of supernova remnants in X-rays and gamma rays provide us with new insights into the acceleration of particles to high energies. This paper reviews
Manami Sasaki
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Measurement of Cosmic-ray Energy Spectrum with the TALE Detector in Hybrid Mode [PDF]
EPJ Web of Conferences, 2023 The TA Low-energy Extension (TALE) experiment extends the energy range observed by the TA experiment to below 1016 eV. We aim to study the transition from galactic to extragalactic cosmic rays.
Oshima Hitoshi +3 more
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Galactic Cosmic Rays Anomalies [PDF]
Proceedings of Neutrino Oscillation Workshop — PoS(NOW2018), 2019 Current measurements of galactic cosmic rays have reached an impressive precision for many species, and extend on wide energy ranges. Some species such as the high energy positron spectrum, the light primary and secondary nuclei and, possibly, the high energy part of the antiproton spectrum, are not straightforwardly explained by current models ...
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Possible Counterpart Signal of the Fermi Bubbles at the Cosmic-Ray Positrons
The Astrophysical Journal, 2023 The inner Galaxy has hosted cosmic-ray burst events, including those responsible for the gamma-ray Fermi bubbles and the eROSITA bubbles in X-rays. In this work, we study the Alpha Magnetic Spectrometer positron fraction and find three features around 12,
Ilias Cholis, Iason Krommydas
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The depth of the shower maximum of air showers measured with AERA [PDF]
EPJ Web of Conferences, 2023 The Auger Engineering Radio Array (AERA), as part of the Pierre Auger Observatory, is an array of radio antennas probing the nature of ultra-high energy cosmic rays at energies around the transition from Galactic to extra-galactic origin. It measures the
Pont Bjarni
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Assessment of galactic cosmic ray models [PDF]
Journal of Geophysical Research: Space Physics, 2012 Among several factors involved in the development of a manned space mission concept, the astronauts' health is a major concern that needs to be considered carefully. Galactic cosmic rays (GCRs), which mainly consist of high‐energetic nuclei ranging from hydrogen to iron and beyond, pose a major radiation health risk in long‐term space missions.
Mrigakshi, Alankrita Isha +4 more
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Cosmic ray driven Galactic winds [PDF]
Monthly Notices of the Royal Astronomical Society, 2016 The escape of cosmic rays from the Galaxy leads to a gradient in the cosmic ray pressure that acts as a force on the background plasma, in the direction opposite to the gravitational pull. If this force is large enough to win against gravity, a wind can be launched that removes gas from the Galaxy, thereby regulating several physical processes ...
Recchia, S. +2 more
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EPJ Web of Conferences, 2013 We discuss the basic features of the propagation of Ultra High Energy Cosmic Rays in astrophysical backgrounds, comparing two alternative computation schemes to compute the expected fluxes.
Aloisio Roberto
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Origin of very high and ultra high energy cosmic rays [PDF]
, 2014 While there is some level of consensus on a Galactic origin of cosmic rays up to the knee ($E_{k}\sim 3\times 10^{15}$ eV) and on an extragalactic origin of cosmic rays with energy above $\sim 10^{19}$ eV, the debate on the genesis of cosmic rays in the ...
Blasi, Pasquale
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