Results 1 to 10 of about 230,400 (298)

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   +7 more sources

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   +7 more sources

Particle-based energetic variational inference [PDF]

Statistics and Computing, 2021
We introduce a new variational inference (VI) framework, called energetic variational inference (EVI). It minimizes the VI objective function based on a prescribed energy-dissipation law. Using the EVI framework, we can derive many existing Particle-based Variational Inference (ParVI) methods, including the popular Stein Variational Gradient Descent ...
Yiwei Wang, Jiuhai Chen, Chun Liu, Lulu Kang   +3 more
openaire   +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

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

Study on Long-Term Variation Characteristics of Geomagnetic Cutoff Rigidities of Energetic Protons Caused by Long-Term Variation of Geomagnetic Field

Frontiers in Earth Science, 2022
As a parameter that quantitatively measures the shielding effect of the Earth’s magnetic field on energetic particles, the geomagnetic cutoff rigidities will change significantly with the long-term change of geomagnetic field.
Wei Chu, Yanyan Yang, Song Xu, Gang Qin , Jianping Huang, Zhima Zeren, Xuhui Shen   +6 more
doaj   +1 more source

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

Dispersive Suprathermal Ion Events Observed by the Parker Solar Probe Mission

The Astrophysical Journal Letters, 2023
During Encounter 11, Parker Solar Probe observed a low-energy dispersive ions event of solar origin. The event was observed in the SPAN-I and IS⊙IS EPI-Lo sensors.
S. T. Alnussirat, R. Livi, D. E. Larson, A. Rahmati, P. L. Whittlesey, O. Romeo, S. T. Badman, Milo Buitrago-Casas, Juan Carlos Martínez Oliveros, M. Pulupa, S. D. Bale, J. Huang, J. Verniero, N. Raouafi, Donald Mitchell, D. J. McComas, Matt Hill, Christina Cohen   +17 more
doaj   +1 more source

Spectral characteristics of waves and particles in the model of cyclotron wave-particle interactions near plasmapause [PDF]

Annales Geophysicae, 1999
Further analysis of energetic electron precipitation at the evening sector of magnetosphere is performed. In the framework of the quantitative model of cyclotron wave-particle interactions developed in the previous Pasmanik et al.
D. l. Pasmanik, D. l. Pasmanik, D. l. Pasmanik, V. Y. Trakhtengerts   +3 more
doaj   +1 more source