Results 111 to 120 of about 1,276 (215)

Solar interacting protons versus interplanetary protons in the core plus halo model of diffusive shock acceleration and stochastic re-acceleration

, 2015
With the first observations of solar γ-rays from the decay of pions, the relationship of protons producing ground level enhancements (GLEs) on the Earth to those of similar energies producing the γ-rays on the Sun has been debated.
Ryan, JM, Afanasiev, A, Vainio, R, Kocharov, L, Laitinen, Timo Lauri mikael, Mursula, M   +5 more
core   +1 more source

Corotating interaction regions as seen by the STEREO Heliospheric Imagers 2007 – 2010

, 2015
T.M. Conlon and A.O. Williams were supported by an STFC, UK studentship and S.E. Milan was supported by STFC grant ST/K001000/1. Date of Acceptance: 08/08/2015NASA’s Solar Terrestrial Relations Observatory (STEREO) mission has coincided with a pronounced
J. A. Davies, Conlon, Thomas Michael, Davies, J.A., Milan, S.E., S. E. Milan, T. M. Conlon, A. O. Williams, Williams, A.O.   +7 more
core   +1 more source

On the relationship between collisionless shock structure and energetic particle acceleration

, 1983
Recent experimental research on bow shock structure and theoretical studies of quasi-parallel shock structure and shock acceleration of energetic particles were reviewed, to point out the relationship between structure and particle acceleration.
Kennel, C. F.
core  

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

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

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

Electron acceleration sites in a large-scale coronal structure

, 1997
Radio observations and interplanetary particle measurements have shown that even in the absence of conspicuous violent processes in the low atmosphere (such as Hα flares) electrons are accelerated in the corona, most likely at higher altitudes than ...
Soru-Escaut, I., Klein, K.-L., Aurass, H., Kálmán, Béla   +3 more
core  

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