The acceleration of cosmic rays in shock fronts – I
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This article is published in Monthly Notices of the Royal Astronomical Society.The article was published on 1978-02-01 and is currently open access. It has received 2613 citations till now. The article focuses on the topics: Shock waves in astrophysics & Fermi acceleration.read more
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Properties of Merger Shocks in Merging Galaxy Clusters
TL;DR: In this paper, the authors studied the properties of merger shocks in merging galaxy clusters, using a set of cosmological simulations for the large-scale structure formation of the universe, and suggested that the shocks propagating along the merger axis could be manifested as X-ray shocks and/or radio relics.
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New Universal Cosmic-Ray Knee near a Magnetic Rigidity of 10 TV with the NUCLEON Space Observatory
E. V. Atkin,V. Bulatov,V. G. Dorokhov,N. V. Gorbunov,S. Filippov,Victor Grebenyuk,D. Karmanov,I. Kovalev,I. Kudryashov,A. Kurganov,M. Merkin,Alexander D. Panov,D. Podorozhny,D. Polkov,S. Porokhovoy,V. Shumikhin,A. V. Tkachenko,L. G. Tkachev,Andrey Turundaevskiy,O. Vasiliev,A. A. Voronin +20 more
TL;DR: In this paper, a universal cosmic ray knee was observed in all groups of nuclei, including heavy nuclei near a magnetic rigidity of about 10 TV, which was probably connected with the limit of acceleration of cosmic rays by some generic or nearby source.
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Cosmological Shock Waves
TL;DR: In this article, the scaling relations for post-shock ion temperature and entropy as functions of shock velocity in strong collisionless multi-fluid shocks are discussed, and it is shown that the multilinear nature of collisionless shocks results in excessive gas compression, energetic particle acceleration, precursor gas heating, magnetic field amplification and non-thermal emission.
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Massive protostars as gamma-ray sources
Valentí Bosch-Ramon,Gustavo E. Romero,Gustavo E. Romero,Anabella T. Araudo,Anabella T. Araudo,Josep M. Paredes +5 more
TL;DR: In this paper, relativistic Bremsstrahlung and proton-proton collisions can make molecular clouds with massive young stellar objects detectable by the Fermi satellite at MeV-GeV energies and by Cherenkov telescope arrays in the GeV-TeV range.
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Efficient Nonthermal Particle Acceleration by the Kink Instability in Relativistic Jets.
TL;DR: A new acceleration mechanism associated with the development of the helical kink instability in relativistic jets, which leads to the efficient conversion of the jet's magnetic energy into nonthermal particles, and offers a viable means of accelerating ultrahigh-energy cosmic rays to 10^{20} eV.