Results 21 to 30 of about 78,898 (343)

Solar Energetic Particle “Ground-Level Enhancements” and the Solar Cycle [PDF]

Solar Physics, 2022
Abstract Severe geomagnetic storms appear to be ordered by the solar cycle in a number of ways: They occur more frequently close to solar maximum and declining phase, are more common in larger solar cycles and show different patterns of occurrence in odd-and even-numbered solar cycles.
Mathew J. Owens, Luke A. Barnard, Benjamin J. S. Pope, Mike Lockwood, Ilya Usoskin, Eleanna Asvestari   +5 more
openaire   +4 more sources

Transport of Solar Energetic Particles [PDF]

International Astronomical Union Colloquium, 1994
AbstractNew developments in the understanding of the interplanetary transport of solar cosmic rays are reviewed. Based on carefully analyzed solar particle events observed on the Helios and ISEE 3 spacecraft, the relation of transport parameters to the structure of the interplanetary magnetic field is discussed.
openaire   +1 more source

GCR access to the Moon as measured by the CRaTER instrument on LRO [PDF]

, 2010
[1] Recent modeling efforts have yielded varying and conflicting results regarding the possibility that Earth\u27s magnetosphere is able to shield energetic particles of \u3e10 MeV at lunar distances.
Blake, J. B., Case, A. W., Golightly, M. J., Kasper, J. C., Mazur, J. E., Spence, Harlan E., Townsend, L. W., Zeitlin, C. J.   +7 more
core   +2 more sources

Energy Spectrum of Solar Energetic Electron Events over 25 Years

The Astrophysical Journal, 2023
We investigate the peak flux energy spectrum of 458 solar energetic electron (SEE) events with a clear velocity dispersion detected at energies from ≤4.2 to ≥108 keV by Wind/3DP from 1994 December through 2019 December, utilizing a pan-spectrum fitting ...
Wen Wang, Linghua Wang, Säm Krucker, Robert F. Wimmer-Schweingruber   +3 more
doaj   +1 more source

Synthesis of 3-D coronal-solar wind energetic particle acceleration modules [PDF]

, 2014
1. Introduction Acute space radiation hazards pose one of the most serious risks to future human and robotic exploration. Large solar energetic particle (SEP) events are dangerous to astronauts and equipment.
Chandran, Benjamin D.G., Cooper, J. F., Desai, M., Downs, Cooper, Germaschewski, Kai K., Giacalone, Joe, Gorby, Matthew J., Isenberg, Philip A., Kasper, J. C., Korreck, K. E., Kozarev, K., Lee, Martin A., Linker, J. A., Lionello, Roberto, Lugaz, Noe E., MacNeice, Peter, Mikic, Z., Riley, P., Schwadron, Nathan A., Smith, Sonya S., Spence, Harlan E., Stevens, M. L., Torak, Tibor   +22 more
core   +2 more sources

The Isotopic Composition of Solar Energetic Particles [PDF]

, 2000
Since the launch of ACE in August 1997, the Solar Isotope Spectrometer (SIS) has observed 11 large solar particle events in which elemental and isotopic composition was determined over a large energy range. The composition of these events has raised many
Christian, E. R., Cohen, C. M. S., Cummings, A. C., Leske, R. A., Mewaldt, R. A., Slocum, P. L., Stone, E. C., von Rosenvinge, T. T., Wiedenbeck, M. E.   +8 more
core   +1 more source

Effects of interplanetary transport on derived energetic particle source strengths [PDF]

, 2010
We study the transport of solar energetic particles (SEPs) in the inner heliosphere in order to relate observations made by an observer at 1 AU to the number and total energy content of accelerated particles at the source, assumed to be near the Sun.
Chollet, E. E., Giacalone, J., Mewaldt, R. A.   +2 more
core   +1 more source

A Living Catalog of Parker Solar Probe IS⊙IS Energetic Particle Enhancements

The Astrophysical Journal Supplement Series, 2023
Energetic charged particles are pervasive throughout the heliosphere with contributions from solar energetic particle events, stream and corotating interaction regions, galactic cosmic rays, anomalous cosmic rays, and suprathermal ions.
J. G. Mitchell, C. M. S. Cohen, T. J. Eddy, C. J. Joyce, J. S. Rankin, M. M. Shen, G. A. de Nolfo, E. R. Christian, D. J. McComas, R. L. McNutt Jr., M. E. Wiedenbeck, N. A. Schwadron, M. E. Hill, A. W. Labrador, R. A. Leske, R. A. Mewaldt, D. G. Mitchell, J. R. Szalay   +17 more
doaj   +1 more source

Large gradual solar energetic particle events

Living Reviews in Solar Physics, 2016
Solar energetic particles, or SEPs, from suprathermal (few keV) up to relativistic ( ∼ few GeV) energies are accelerated near the Sun in at least two ways: (1) by magnetic reconnection-driven processes during solar flares resulting in impulsive SEPs, and (2) at fast coronal-mass-ejection-driven shock waves that produce large gradual SEP events.
Mihir Desai, Joe Giacalone
openaire   +3 more sources

Review of Solar Energetic Particle Models [PDF]

, 2022
Solar Energetic Particles (SEP) events are interesting from a scientific perspective as they are the product of a broad set of physical processes from the corona out through the extent of the heliosphere, and provide insight into processes of particle acceleration and transport that are widely applicable in astrophysics. From the operations perspective,
Whitman, Kathryn, Egeland, Ricky, Richardson, Ian G, Allison, Clayton, Quinn, Philip, Barzilla, Janet, Kitiashvili, Irina, Sadykov, Viacheslav, Bain, Hazel M, Dierckxsens, Mark, Mays, M Leila, Tadesse, Tilaye, Lee, Kerry T, Semones, Edward, Luhmann, Janet G, Nunez, Marlon, White, Stephen M, Kahler, Stephen W, Ling, Alan G, Smart, Don F, Shea, Margaret A, Tenishev, Valeriy, Soukaina F, Boubrahimi, Aydin, Berkay, Martens, Petrus, Angryk, Rafal, Marsh, Michael S, Dalla, Silvia, Crosby, Norma, Schwadron, Nathan A, Kozarev, Kamen, Gorby, Matthew, Young, Matthew A, Laurenza, Monica, Cliver, Edward W, Alberti, Tommaso, Stumpo, Mirko, Benella, Simone, Papaioannou, Athanasios, Anastasiadis, Anastasios, Sandberg, Ingmar, Georgoulis, Manolis K, Ji, Anli, Kempton, Dustin, Pandey, Chetraj, Li, Gang, Hu, Junxiang, Zank, Gary P, Lavasa, Eleni, Giannopoulos, Giorgos, Falconer, David, Kadadi, Yash, Fernandes, Ian, Dayeh, Maher A, Munoz-Jaramillo, Andres, Chatterjee, Subhamoy, Moreland, Kimberly D, Sokolov, Igor V, Roussec, Ilia I, Taktakishvili, Aleksandre, Effenberger, Frederic, Gombosi, Tamas, Huang, Zhenguang, Zhao, Lulu, Wijsen, Nicolas, Aran, Angels, Poedts, Stefaan, Kouloumvakos, Athanasios, Paassilita, Miikka, Vainio, Rami, Belov, Anatoly, Eroshenko, Eugenia A, Abunina, Maria A, Abunin, Artem A, Balch, Christopher C, Malandraki, Olga, Karavolos, Michalis, Herber, Bernd, Labrenz, Johannes, Kühl, Patrick, Kosovichev, Alexander G, Oria, Vincent, Nita, Gelu M, Illarionov, Egor, O'Keefe, PAtrick M, Jiang, Yucheng, Fereira, Sheldon H, Ali, Aatiya, Paouris, Evangelos, Aminalfragia-Giamini, Sigiava, Jiggens, Piers, Jin, Meng, Lee, Christina O, Palmerio, Erika, Bruno, Alessandro, Kasapis, Spiridon, Wang, Xiantong, Cheng, Yang, Sanahuja, Blai, Lario, David, Jacobs, Carla, Strauss, Du Toit, Steyn, Ruhann, den Berg van, Jabus, Swalwell, Bill, Waterfall, Charlotte, Nedal, Mohamed, Miteva, Rositsa, Dechev, Momchil, Zucca, Pietro, Engell, Alec, Maze, Brianna, Farmer, Harold, Kerber, Thuha, Barnett, Ben, Loomis, Jeremy, Grey, Nathan, Thompson, Barbara J, Linker, Jon A, Caplan, Ronald M, Downs, Cooper, Török, Tibor, Linello, Roberto, Titov, Viacheslav, Zhang, Ming, Hosseinzadeh, Pouya   +125 more
openaire   +1 more source