Cosmic ray protons in the energy range 1016-1018.5eV: stochastic gyroresonant acceleration in hypernova shocks?
نویسندگان
چکیده
منابع مشابه
Cosmic ray protons in the energy range 10 16 − 10 18 . 5 eV : stochastic gyroresonant acceleration in hypernova shocks ?
The hypernovae (HNe) associated with Gamma-ray Bursts (GRBs) may have a fairly steep energy-velocity distribution, i.e., E(≥ β) ∝ β for q < 2 and β ≥ βo, where β is the velocity of the material and βo ∼ 0.1 is the velocity of the slowest ejecta of the HN explosion, both in units of the speed of light (c). The cosmic ray protons above the second knee but below the ankle may be accelerated by the...
متن کاملCosmic ray protons in 10 16 − 10 18 . 5 eV : Stochastic gyroresonant acceleration in hypernova shocks ?
The hypernovae (HNe) associated with Gamma-ray Bursts (GRBs) may have a fairly steep energy-velocity distribution, i.e., E(≥ β) ∝ β for q < 2 and β ≥ βo, where β is the velocity of the material and βo ∼ 0.1 is the velocity of the slowest ejecta of the HN explosion, both in units of the speed of light (c). The cosmic ray protons above the second knee but below the ankle may be accelerated by the...
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Galactic cosmic rays are widely believed to be accelerated in expanding shock waves initiated by supernova explosions. The theory of diffusive shock acceleration of cosmic rays is now well established, but two fundamental questions remain partly unanswered: what is the acceleration efficiency, i.e. the fraction of the total supernova energy converted to cosmic-ray energy, and what is the maximu...
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Data taken with ten Cosmic Ray Tracking (CRT) detectors and the HEGRA air-shower array on La Palma, Canary Islands, have been analysed to investigate changes of the cosmic-ray mass composition at the ‘knee’ of the cosmic-ray flux spectrum near 1015 eV energy. The analysis is based on the angular distributions of particles in air showers. HEGRA data provided the shower size, direction, and core ...
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Dynamics of shock acceleration of ultrarelativistic particles is analyzed with the emphasis on the backreaction of such particles on the shock parameters. To this end, a complete kinetic description of accelerated particles coupled with the plasma flow around a shock, is reduced to a tracktable system of time dependent integro-differential equations. A well known multiplicity [1] of stationary ...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2008
ISSN: 0035-8711,1365-2966
DOI: 10.1111/j.1365-2966.2008.13632.x