Results 1 to 10 of about 1,495,918 (202)

ERNE observations of energetic particles associated with Earth-directed coronal mass ejections in April and May, 1997 [PDF]

Annales Geophysicae, 2000
Two Earth-directed coronal mass ejections (CMEs), which were most effective in energetic (~1–50 MeV) particle acceleration during the first 18 months since the Solar and Heliospheric Observatory (SOHO) launch, occurred on April 7 and May 12, 1997.
A. Anttila, T. Sahla
doaj   +1 more source

Imaging and Radio Signatures of Shock–Plasmoid Interaction

The Astrophysical Journal Letters
Understanding how shocks interact with coronal structures is crucial for understanding the mechanisms of particle acceleration in the solar corona and inner heliosphere.
Pankaj Kumar, Judith T. Karpen, P. K. Manoharan, N. Gopalswamy   +3 more
doaj   +1 more source

Turbulent Magnetic Reconnection as an Acceleration Mechanism in Earth’s Magnetotail

The Astrophysical Journal
Using electric and magnetic fields measured by the Magnetospheric Multiscale (MMS) mission, we construct a test-particle simulation of a turbulent magnetic reconnection region to investigate observed ion acceleration. We identify three types of energized
Daniel D. Sega, Robert E. Ergun
doaj   +1 more source

Ulysses COSPIN observations of cosmic rays and solar energetic particles from the South Pole to the North Pole of the Sun during solar maximum [PDF]

Annales Geophysicae, 2003
In 2000–2001 Ulysses passed from the south to the north polar regions of the Sun in the inner heliosphere, providing a snapshot of the latitudinal structure of cosmic ray modulation and solar energetic particle populations during a period near ...
R. B. McKibben, J. J. Connell, C. Lopate, M. Zhang, J. D. Anglin, A. Balogh, S. Dalla, T. R. Sanderson, R. G. Marsden, M. Y. Hofer, H. Kunow, A. Posner, B. Heber   +12 more
doaj   +1 more source

SH41B-2777: The acceleration of particles at propagating interplanetary shocks

, 2018
Enhancements of charged energetic particles are often observed at Earth following the eruption of coronal mass ejections (CMEs) on the Sun. These enhancements are thought to arise from the acceleration of those particles at interplanetary shocks forming ahead of CMEs, propagating into the heliosphere.
Prinsloo, Phillip, Strauss, Du Toit
openaire   +1 more source

Multispacecraft Energetic Particle Enhancements Associated with a Single Corotating Interaction Region

The Astrophysical Journal
The radial evolution of particles accelerated at corotating interaction regions (CIRs) is not fully understood, particularly the distance range over which this particle acceleration occurs and how the energy spectra are modulated by transport through the
M. J. Starkey, M. A. Dayeh, M. I. Desai, R. Bučík, S. T. Hart, H. A. Elliott   +5 more
doaj   +1 more source

Turbulence-driven Anisotropic Acceleration of Energetic Electrons in Solar Wind Current Sheets

The Astrophysical Journal Letters
Coherent structures in the solar wind, such as current sheets, are widely recognized as potential sites for energy dissipation and particle acceleration.
L. D. Wang, Y. Wang, F. S. Wei, X. S. Feng, B. Y. Wang, P. B. Zuo, Y. L. Chen, X. J. Xu, Z. L. Zhou   +8 more
doaj   +1 more source

The acceleration of energetic particles in the interplanetary medium by transit time damping [PDF]

Journal of Geophysical Research, 1976
It has been reported recently by McDonald et al. (1976) that 1-MeV protons may undergo considerable acceleration in corotating streams. It has been suggested recently by Fisk et al. (1974b) that interstellar neutral particles which are ionized in the solar cavity may be accelerated in the solar wind and may account for the anomalous component that is ...
openaire   +1 more source

Quantifying the Effects of Parameters in Widespread Solar Energetic Particle Events with EPREM

The Astrophysical Journal
The Energetic Particle Radiation Environment Model (EPREM) solves the focused transport equation on a Lagrangian grid in a frame comoving with the solar wind plasma and simulates the acceleration and transport of solar energetic particles (SEPs) in the ...
Matthew A. Young, Bala Poduval
doaj   +1 more source

Modulation of cosmic-ray ground-level enhancements by solar-wind stream interfaces: a case study [PDF]

Annales Geophysicae
Ground-level enhancements (GLEs) provide crucial insights into the acceleration and transport of solar energetic particles (SEPs). We present a comprehensive analysis of GLE 72, which occurred on 10 September 2017, coinciding with a solar-wind stream ...
O. Ogunjobi, O. Ogunjobi, W. T. Sivla
doaj   +1 more source