Results 91 to 100 of about 13,868 (214)

Energetic particle investigation using the ERNE instrument

Annales Geophysicae
During solar flares and coronal mass ejections, nuclei and electrons accelerated to high energies are injected into interplanetary space. These accelerated particles can be detected at the SOHO satellite by the ERNE instrument.
J. Torsti, E. Valtonen, L. Kocharov, M. Lumme, T. Eronen, M. Louhola, E. Riihonen, G. Schultz, M. Teittinen, R. Vainio, A. Anttila, J. Kuusela   +11 more
doaj  

Solar Energetic Particle Events in the 23rd Solar Cycle: Interplanetary Magnetic Field Configuration and Statistical Relationship with Flares and CMEs

, 2012
We study the influence of the large-scale interplanetary magnetic field configuration on the solar energetic particles (SEPs) as detected at different satellites near Earth and on the correlation of their peak intensities with the parent solar activity ...
Dorrian, G., Klein, K. -L., Malandraki, O., Miteva, R.   +3 more
core   +3 more sources

Solar Wind With Field Lines and Energetic Particles (SOFIE) Model: Application to Historical Solar Energetic Particle Events

Space Weather
In this paper, we demonstrate the applicability of the data‐driven solar energetic particle (SEP) model, SOlar‐wind with FIeld‐lines and Energetic‐particles (SOFIE), to simulate the acceleration and transport processes of SEPs and make forecast of the ...
Lulu Zhao, Igor Sokolov, Tamas Gombosi, David Lario, Kathryn Whitman, Zhenguang Huang, Gabor Toth, Ward Manchester, Bart van derHolst, Nishtha Sachdeva, Weihao Liu   +10 more
doaj   +1 more source

A Tempered Fractional Kinetic Transport Theory for Energetic Particle Interaction with Quasi-two-dimensional Turbulence in the Large-scale Solar Wind

The Astrophysical Journal
Observational evidence is accumulating that turbulence in the solar wind is intermittent (non-Gaussian) because of the strong presence of a quasi-two-dimensional (quasi-2D), low-frequency turbulence component containing nonpropagating, closed, small ...
J. A. le Roux
doaj   +1 more source

The Diffusion and Scattering of Accelerating Particles in Compressible MHD Turbulence

The Astrophysical Journal
We numerically study the diffusion and scattering of cosmic rays (CRs) together with their acceleration processes in the framework of the modern understanding of magnetohydrodynamic (MHD) turbulence. Based on the properties of compressible MHD turbulence
Na-Na Gao, Jian-Fu Zhang
doaj   +1 more source

The interplanetary acceleration of energetic nucleons [PDF]

Co-rotating proton and electron streams are the dominant type of low-energy (0.1-10 MeV/nucleon) particle event observed at 1 A.U. The radial dependence of these events was studied between 1 and 4.6 A.U.
Mcdonald, F. B., Teegarden, B. J., Trainor, J. H., Vonrosenvinge, T. T., Webber, W. R.   +4 more
core   +1 more source

Compression Acceleration of Protons and Heavier Ions at the Heliospheric Current Sheet

The Astrophysical Journal
Recent observations by the Parker Solar Probe (PSP) suggest that protons and heavier ions are accelerated to high energies by magnetic reconnection at the heliospheric current sheet (HCS).
Giulia Murtas, Xiaocan Li, Fan Guo
doaj   +1 more source

The average solar wind in the inner heliosphere: Structures and slow variations [PDF]

, 1983
Measurements from the HELIOS solar probes indicated that apart from solar activity related disturbances there exist two states of the solar wind which might result from basic differences in the acceleration process: the fast solar wind (v 600 kms(-)1 ...
Schwenn, R.
core   +1 more source

First analysis of GLE 72 event on 10 September 2017: Spectral and anisotropy characteristics

, 2018
Using neutron monitor and space-borne data we performed an analysis of the second ground level enhancement of solar cycle 24, namely the event of 10 September 2017 (GLE 72) and derive the spectral and angular characteristics of GLE particles.
Kocharov, L. G., Mishev, A. L., Paassilta, M., Raukunen, O., Usoskin, I. G., Vainio, R., Valtonen, E.   +6 more
core   +1 more source

Electron Acceleration at Shock Ripples: Role of Pitch-angle Diffusion

The Astrophysical Journal
Suprathermal electrons are routinely observed in interplanetary space. At higher energies, there are in-situ evidences that shocks, both interplanetary shocks, often driven by fast coronal mass ejections, and terrestrial bow shocks, can accelerate ...
Y. D. Xu, G. Li, S. Yao
doaj   +1 more source