Results 81 to 90 of about 612 (171)

Interplanetary Magnetic Field Curvature and Its Role in Particle Acceleration: Magnetospheric Multiscale and Solar Orbiter Observations

The Astrophysical Journal
The curvature of the magnetic field plays a crucial role in magnetic confinement, magnetic reconnection, particle heating, and acceleration. Though the magnetic field curvature has been sufficiently investigated in the terrestrial magnetosheath, there is
D. K. Hu, Y. Y. Liu, J. B. Cao, C. M. Liu, Y. T. Song   +4 more
doaj   +1 more source

Two‐Step Electron Acceleration During a Flux Rope Crossing of Earth's Bow Shock

Geophysical Research Letters
The generation of cosmic ray particles with ultra‐relativistic energies is a crucial issue in astrophysical and space physics. Shocks have been acknowledged as efficient accelerators in the universe which can produce energetic particles through a variety
D. K. Hu, Y. Y. Liu, J. B. Cao, C. M. Liu   +3 more
doaj   +1 more source

The Polarization Signatures of the Inverse Cascade in Magnetic Turbulence

The Astrophysical Journal
The inverse cascade of magnetic energy from smaller to larger scales is a key physical process for the formation of coherent magnetic fields in many astronomical turbulent systems.
X. W. Zhu, Y. Xie, Z. Lei, W. Q. Yuan, X. X. Jin, Z. H. Zhao, B. Qiao   +6 more
doaj   +1 more source

Tempered Superdiffusive Shock Acceleration at a Perpendicular Shock

The Astrophysical Journal
A theory for steady-state tempered superdiffusive shock acceleration of energetic particles at a plane perpendicular shock is presented that involves solving analytically a tempered fractional Parker transport equation for perpendicular transport in ...
J. A. le Roux, R. K. Shikha
doaj   +1 more source

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

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
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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

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

IMAP's Role in Understanding Particle Injection and Energization Throughout the Heliosphere. [PDF]

Space Sci Rev
Cohen CMS, Alterman BL, Baker DN, Bruno A, Bzowski M, Christian ER, Cohen IJ, Dalla S, Dayeh MA, Desai MI, Elliott HA, Giacalone J, Gkioulidou M, Guo F, Horbury T, Kanekal SG, Kowalska-Leszczyńska I, Lee CO, Livadiotis GI, Luhmann JG, Matthaeus WH, McComas DJ, Mitchell JG, Moebius E, Rankin J, Richardson JD, Schwadron NA, Skoug R, Turner D, Zank G, Zirnstein EJ.   +30 more
europepmc   +1 more source