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Solar flares and energetic particles [PDF]
Philosophical Transactions Series A, Mathematical, Physical, and Engineering Sciences, 2012 Solar flares are now observed at all wavelengths from γ -rays to decametre radio waves. They are commonly associated with efficient production of energetic particles at all energies. These particles play a major role in the active Sun because they contain a large amount of the energy released
N Vilmer
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Space Science Reviews, 2000
The emission of energetic particles from the Sun is one of the major manifestations of high energy astrophysics and is related to a variety of astrophysical and geophysical phenomena in the heliosphere. An event of solar energetic particles (SEP) is seen as a sudden rise of the counting rate of the background galactic cosmic rays reaching a high value ...
James M. Ryan +2 more
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The emission of energetic particles from the Sun is one of the major manifestations of high energy astrophysics and is related to a variety of astrophysical and geophysical phenomena in the heliosphere. An event of solar energetic particles (SEP) is seen as a sudden rise of the counting rate of the background galactic cosmic rays reaching a high value ...
James M. Ryan +2 more
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Solar wind turbulence: Connections with energetic particles
New Astronomy, 2021Abstract For the solar wind, a wealth of observational evidence indicates that turbulence is an important dynamical process for velocity (v), magnetic (b), and other related fluctuations at MHD (fluid) scales. Here we review such observations and turbulence features, including discussion of when wave or turbulence descriptions can (or cannot) explain
Oughton, Sean, Engelbrecht, N. Eugene
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COSMIC RAY SOURCE AND SOLAR ENERGETIC PARTICLES
Problems of Atomic Science and Technology, 2023The acceleration of particles to the high energy is one of the key issues of solar physics, cis-lunar irradiations, astrophysics, and astroparticle physics. With the development of space astronomy, people started to realize that plasma disturbances in solar flares, Earth’s magnetosphere, and interplanetary space can also produce a large population of ...
Cass??, M., Maslov, V.I.
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International Journal of Modern Physics A, 2005
Energetic particles recorded in the Earth environment and in interplanetary space have a multitude of origins, i.e. acceleration and propagation histories. At early days practically all sufficiently energetic particles were considered to have come either from solar flares or from interstellar space.
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Energetic particles recorded in the Earth environment and in interplanetary space have a multitude of origins, i.e. acceleration and propagation histories. At early days practically all sufficiently energetic particles were considered to have come either from solar flares or from interstellar space.
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Solar energetic particles: Is there time to hide?
Radiation Measurements, 1999In the large solar energetic particle (SEP) events that constitute a serious radiation hazard, particles are accelerated at shock waves driven out from the Sun by coronal mass ejections (CMEs). A self-regulating mechanism of wave formation by the streaming particles limits SEP intensities early in the event. Hazardous intensities do not occur until the
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2010
Some observational aspects of solar energetic particles (SEPs) are briefly discussed. The shift from the flare paradigm of SEP origin through the two-class paradigm of impulsive and gradual SEP events to hybrid events is described. Comprehensive investigations of coronal mass ejections (CMEs) and solar energetic particles during the SOHO era have shown
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Some observational aspects of solar energetic particles (SEPs) are briefly discussed. The shift from the flare paradigm of SEP origin through the two-class paradigm of impulsive and gradual SEP events to hybrid events is described. Comprehensive investigations of coronal mass ejections (CMEs) and solar energetic particles during the SOHO era have shown
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Energetic particles in solar flares
AIP Conference Proceedings, 1979The principal properties of energetic particles accelerated in solar flares are reviewed. Particular emphasis is placed on the high energy flare component whose acceleration is often referred to as second phase acceleration. Stochastic Fermi acceleration is treated analytically, and the results of the computation are compared with particle and gamma ...
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Solar Energetic Particle Studies
1983As against the discussions of the galactic cosmic ray that we have had so far, we shall discuss the other component of cosmic rays namely the solar cosmic rays.
M. N. Vahia, S. Biswas
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Propagation of Energetic Solar Particles
1985In this Section we present some observational data on energetic particles accelerated on the Sun; these data are required for constructing models of particle propagation in interplanetary space. The data presented are only basic and not totally complete.
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