Results 151 to 160 of about 669 (180)

Particle acceleration and Alfvén wave generation by an interplanetary shock

Astronomy Letters, 2016
Based on the event observed by ISEE 3 near the Earth’s orbit at 01:21 UT on April 5, 1979, we investigate the diffusive shock acceleration of ions and the generation of Alfven waves by accelerated particles near the quasi-parallel parts of interplanetary shock fronts within a quasi-linear approach.
S N Taneev, E G Berezhko, Taneev S N
exaly   +2 more sources

The structure and evolution of interplanetary shocks and the relevance for particle acceleration

Nuclear Physics, Section B, Proceedings Supplements, 1995
It is now widely accepted that interplanetary shocks initiated by coronal mass ejections play a dominant role in the generation of the vast majority of large solar energetic particle events. However, our understanding of the details of the acceleration process is far from complete.
exaly   +2 more sources

The acceleration of charged particles in interplanetary shock waves

Space Science Reviews, 1982
Consideration of the theoretical and observational literature on energetic ion acceleration in interplanetary shock waves is the basis for the present discussion of the shock acceleration of the solar wind plasma and particle transport effects. It is suggested that ISEE data be used to construct data sets for shock events that extend continuously from ...
M.E. Pesses, R.B. Decker, T.P. Armstrong
openaire   +1 more source

Acceleration in solar flares: Interacting particles versus interplanetary particles

Advances in Space Research, 1993
Abstract We study the properties of flare accelerated particles using gamma ray observations. We derive ion and electron energy spectra, electron to proton ratios, and numbers of interacting particles. We investigate the effects of the abundance variations implied by the gamma ray data on these parameters.
R. Ramaty, N. Mandzhavidze, B. Kozlovsky, J.G. Skibo   +3 more
openaire   +1 more source

Solar and interplanetary particle acceleration

Advances in Space Research, 2003
Abstract The nature and location of energetic particle acceleration (excluding planetary magnetospheres) in the inner heliosphere ( 1000 km/sec) coronal mass ejections is examined, but we find that they are not normally associated with relativistic energetic particle acceleration, although they may enhance the energy of particles already present in ...
openaire   +1 more source

Fe/O Ratios in Interplanetary Shock Accelerated Particles

Space Science Reviews, 2007
It is widely accepted that diffusive shock acceleration is an important process in the heliosphere, in particular in producing the energetic particles associated with interplanetary shocks driven by coronal mass ejections. In its simplest formulation shock acceleration is expected to accelerate ions with higher mass to charge ratios less efficiently ...
H. V. Cane, I. G. Richardson, T. T. von Rosenvinge   +2 more
openaire   +1 more source

Interplanetary particle acceleration, modulation and drift

Reviews of Geophysics, 1979
This report is concerned mainly with the contribution of U. S. scientists, during the period 1975–1978, to the general area of particle acceleration and transport in the solar wind, excluding particles of solar origin. Other work is cited only when it bears directly on the subject being discussed.
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Particle acceleration by coronal and interplanetary shock waves

Advances in Space Research, 1982
Utilizing many years of observation from deep space and near-earth spacecraft a theoretical understanding has evolved on how ions and electrons are accelerated in interplanetary shock waves. This understanding is now being applied to solar flare-induced shock waves propagating through the solar atmosphere.
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Charged particle acceleration processes in the interplanetary medium

Advances in Space Research, 1989
Abstract Selected aspects of energetic (>35 keV) ion acceleration processes in three regions of the heliosphere are reviewed: at interplanetary travelling shocks near 1 AU, in the outer heliosphere and in cometary environments. Clear examples of diffusive acceleration events at quasi-parallel shocks as well as of shock drift acceleration events at ...
openaire   +1 more source

Particle Acceleration Processes in Interplanetary Space

1985
The preceeding chapters have been concerned mainly with multiple scattering, diffusion, and convective transport of particles. In passing, some processes of particle energy variations have been considered, such as adiabatic deceleration in expanding streams of magnetic inhomogeneities (§8,1, 12, 13) and in large-scale magnetic fields frozen into the ...
openaire   +1 more source