Results 111 to 120 of about 13,753 (202)

Imbalance acceleration/escape of energetic particles at interplanetary shocks: effect on spectral steepening [PDF]

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021), 2021
Federico Fraschetti, A. Balkanski
openaire   +1 more source

Evidence of Time-dependent Diffusive Shock Acceleration in the 2022 September 5 Solar Energetic Particle Event

The Astrophysical Journal
On 2022 September 5, a large solar energetic particle (SEP) event was detected by Parker Solar Probe (PSP) and Solar Orbiter (SolO) at heliocentric distances of 0.07 and 0.71 au, respectively.
Xiaohang Chen, Lulu Zhao, Joe Giacalone, Nishtha Sachdeva, Igor V. Sokolov, Gábor Tóth, Christina M. S. Cohen, David Lario, Fan Guo, Athanasios Kouloumvakos, Tamas I. Gombosi, Zhenguang Huang, Ward B. Manchester IV, Bart van der Holst, Weihao Liu, David J. McComas, Matthew E. Hill, George C. Ho   +17 more
doaj   +1 more source

The variation of solar proton energy spectra size distribution with heliolongitude [PDF]

A statistical study of the initial phases of 185 solar particle events was carried out using the data from cosmic ray experiments on IMP 4 and IMP 5. Special emphasis was placed on the identification of the associated solar flare, as the parent flare can
Masung, L. S., Mcdonald, F. B., Vanhollebeke, M. A. I.   +2 more
core   +1 more source

Particle acceleration by the sun [PDF]

A review is given of the analysis of new observations of energetic particles and energetic secondary emissions obtained over the solar maxium (approx. 1980) by the Solar Maximum mission, Hinotori, the international Sun-Earth Explorer, Helios, Explorer ...
Lin, R. P.
core   +1 more source

Examining the Radial Evolution of a Corotating Interaction Region Observed at STEREO-A and MAVEN

The Astrophysical Journal
Corotating interaction regions (CIRs) are long-lasting solar wind structures that persist over multiple solar rotations. These structures accelerate particles throughout the heliosphere and can impart significant energy onto planetary ionospheres and ...
Sarah A. Henderson, Rachael J. Filwett, Christina O. Lee, Rebecca Jolitz, Robert C. Allen, Maher A. Dayeh, Ali Rahmati, Davin Larson, Jasper S. Halekas, Jacob R. Gruesbeck, Antoinette Galvin, Hanying Wei, Bernd Heber   +12 more
doaj   +1 more source

Frequency-dispersed Ion Acoustic Waves in the Near-Sun Solar Wind: Signatures of Impulsive Ion Beams

The Astrophysical Journal
This work reports a novel plasma wave observation in the near-Sun solar wind: frequency-dispersed ion acoustic waves. Similar waves have previously been reported in association with interplanetary shocks or planetary bow shocks, but the waves reported ...
David M. Malaspina, Robert E. Ergun, Iver H. Cairns, Benjamin Short, Jaye L. Verniero, Cynthia Cattell, Roberto Livi   +6 more
doaj   +1 more source

Research in particles and fields [PDF]

Investigations, by particle-detectors flown on spacecraft, of the astrophysical aspects of cosmic radiation and the radiation environment of the earth are reported along with the research of the interplanetary medium, and planetary magnetic fields.
Vogt, R. E.
core   +1 more source

Observations of solar flare gamma-rays and protons [PDF]

Solar flare gamma-rays (4 to 7 MeV) and protons (8 to 500 MeV) were simultaneously observed from six flares on 1 Apr., 4 Apr., 27, Apr. 13, May 1981, 1 Feb. and 6 June 1982 by the Hinotori and GMS satellites. The relationship between 4 to 7 MeV gamma-ray
Watanabe, H., Yoshimori, M.
core   +1 more source

Characterizing the Impact of Alfvén Wave Forcing in Interplanetary Space on the Distribution of Near-Earth Solar Wind Speeds

The Astrophysical Journal Letters
Broadly, solar wind source regions can be classified by their magnetic topology as intermittently and continuously open to the heliosphere. Early models of solar wind acceleration do not account for the fastest, nontransient solar wind speeds observed ...
B. L. Alterman
doaj   +1 more source

Plasma Environment, Radiation, Structure, and Evolution of the Uranian System (PERSEUS): A Dedicated Orbiter Mission Concept to Study Space Physics at Uranus. [PDF]

Space Sci Rev, 2023
Cohen IJ, Smith EJ, Clark GB, Turner DL, Ellison DH, Clare B, Regoli LH, Kollmann P, Gallagher DT, Holtzman GA, Likar JJ, Morizono T, Shannon M, Vodusek KS.   +13 more
europepmc   +1 more source