Results 1 to 10 of about 78,898 (343)

Sources of solar energetic particles. [PDF]

Philos Trans A Math Phys Eng Sci, 2019
Solar energetic particles are an integral part of the physical processes related with space weather. We present a review for the acceleration mechanisms related to the explosive phenomena (flares and/or coronal mass ejections, CMEs) inside the solar corona.
Vlahos L, Anastasiadis A, Papaioannou A, Kouloumvakos A, Isliker H.   +4 more
europepmc   +5 more sources

Comparing Methods for Calculating Solar Energetic Particle Intensities: Rebinning versus Spectral Binning [PDF]

The Astrophysical Journal
Solar energetic particle (SEP) events have been observed for decades in the interplanetary medium by spacecraft measuring the intensity of energetic ions and electrons.
M. E. Cuesta, L. Y. Khoo, G. Livadiotis, M. M. Shen, J. R. Szalay, D. J. McComas, J. S. Rankin, R. Bandyopadhyay, H. A. Farooki, J. T. Niehof, C. M. S. Cohen, R. A. Leske, Z. Xu, E. R. Christian, M. I. Desai, M. A. Dayeh   +15 more
doaj   +2 more sources

Formation of the Injection Function of Solar Energetic Particles in Gradual Events [PDF]

The Astrophysical Journal, 2023
We present a model for solar energetic particle injection into interplanetary space in gradual events, in which particle acceleration occurs in a limited region of the solar atmosphere.
Ivan Petukhov, Anastasia Petukhova, Stanislav Petukhov   +2 more
doaj   +2 more sources

A Perspective on Solar Energetic Particles

Frontiers in Astronomy and Space Sciences, 2022
The author has been fortunate to observe and participate in the rise of the field of solar energetic particles (SEPs), from the early abundance studies, to the contemporary paradigm of shock acceleration in large SEP events, and element abundance ...
Donald V. Reames
doaj   +3 more sources

Pitch-angle Distributions of 0.5–1 GeV Solar Protons Crossing Earth’s Orbit: Influence of the Large-scale Turbulent Interplanetary Magnetic Field

The Astrophysical Journal, 2023
Using numerical simulations, we analyze the time evolution of the pitch-angle distribution of 500 MeV and 1 GeV solar protons, released impulsively near the Sun, at 1 au. The numerical model solves the equations of motion of an ensemble of particles that
Ashraf Moradi, Joe Giacalone
doaj   +1 more source

On the Onset Delays of Solar Energetic Electrons and Protons: Evidence for a Common Accelerator

The Astrophysical Journal, 2023
The processes responsible for the acceleration of solar energetic particles (SEPs) are still not well understood, including whether SEP electrons and protons are accelerated by common or separate processes. Using a numerical particle transport model that
R. D. Strauss, N. Dresing, I. G. Richardson, J. P. van den Berg, P. J. Steyn   +4 more
doaj   +1 more source

Solar energetic particle variations [PDF]

Advances in Space Research, 2004
The population of energetic particles in the heliosphere changes from solar maximum to solar minimum. The ultimate driver for those variations is the Sun. Solar variability is reflected in the dynamics of the large-scale structure of the heliosphere, the solar output of energetic particles and most definitively in the intensity, energy and composition ...
David Lario, George M. Simnett
openaire   +2 more sources

Energetic Neutral Atoms from Solar Energetic Particles due to Shocks: Inclusion of Upstream Particles

The Astrophysical Journal, 2023
Many aspects of solar energetic particles are not well understood, including their acceleration mechanism. There has been recent interest in the potential of energetic neutral atoms (ENAs) as remote probes of solar energetic particles (SEPs) and their ...
Brent M. Randol, Errol J. Summerlin, Jeewoo Park   +2 more
doaj   +1 more source

The Energetic Particle Detector [PDF]

Astronomy & Astrophysics, 2020
After decades of observations of solar energetic particles from space-based observatories, relevant questions on particle injection, transport, and acceleration remain open. To address these scientific topics, accurate measurements of the particle properties in the inner heliosphere are needed. In this paper we describe the Energetic Particle Detector (
Rodriguez-Pacheco, J, Wimmer-Schweingruber, RF, Mason, GM, Ho, GC, Sanchez-Prieto, S, Prieto, M, Martin, C, Seifert, H, Andrews, GB, Kulkarni, SR, Panitzsch, L, Boden, S, Boettcher, SI, Cernuda, I, Elftmann, R, Espinosa Lara, F, Gomez-Herrero, R, Terasa, C, Almena, J, Begley, S, Boehm, E, Blanco, JJ, Boogaerts, W, Carrasco, A, Castillo, R, Da Silva Farina, A, De Manuel Gonzalez, V, Drews, C, Dupont, AR, Eldrum, S, Gordillo, C, Gutierrez, O, Haggerty, DK, Hayes, JR, Heber, B, Hill, ME, Juengling, M, Kerem, S, Knierim, V, Koehler, J, Kolbe, S, Kulemzin, A, Lario, D, Lees, WJ, Liang, S, Martinez Hellin, A, Meziat, D, Montalvo, A, Nelson, KS, Parra, P, Paspirgilis, R, Ravanbakhsh, A, Richards, M, Rodriguez-Polo, O, Russu, A, Sanchez, I, Schlemm, CE, Schuster, B, Seimetz, L, Steinhagen, J, Tammen, J, Tyagi, K, Varela, T, Yedla, M, Yu, J, Agueda, N, Aran, A, Horbury, TS, Klecker, B, Klein, K-L, Kontar, E, Krucker, S, Maksimovic, M, Malandraki, O, Owen, CJ, Pacheco, D, Sanahuja, B, Vainio, R, Connell, JJ, Dalla, S, Droege, W, Gevin, O, Gopalswamy, N, Kartavykh, YY, Kudela, K, Limousin, O, Makela, P, Mann, G, Onel, H, Posner, A, Ryan, JM, Soucek, J, Hofmeister, S, Vilmer, N, Walsh, AP, Wang, L, Wiedenbeck, ME, Wirth, K, Zong, Q   +98 more
openaire   +5 more sources

Analysis of SEP Events and Their Possible Precursors Based on the GSEP Catalog

The Astrophysical Journal Supplement Series, 2023
Solar energetic particle (SEP) events are one of the most crucial aspects of space weather. Their prediction depends on various factors including the source solar eruptions such as flares and coronal mass ejections (CMEs).
Sumanth Rotti, Petrus C. Martens
doaj   +1 more source