Results 51 to 60 of about 9,560 (226)

On the Formation of Super-Alfvénic Flows Downstream of Collisionless Shocks

The Astrophysical Journal
Super-Alfvénic jets, with kinetic energy densities significantly exceeding that of the solar wind, are commonly generated downstream of Earth's bow shock under both high- and low-beta plasma conditions. In this study, we present theoretical evidence that
Adnane Osmane, Savvas Raptis
doaj   +1 more source

Magnetic Discontinuities in the Inner Heliosphere: Do Intermediate Shocks Exist?

The Astrophysical Journal, 2023
Magnetic discontinuities are fundamental structures in space and laboratory plasmas where the changes in magnetic and velocity fields are constrained by Rankine–Hugoniot relations.
Y. Y. Liu, H. S. Fu, J. B. Cao, Z. Wang, R. J. He, Z. Z. Guo, C. X. Du   +6 more
doaj   +1 more source

Space storm measurements of the July 2005 solar extreme events from the low corona to the Earth

, 2010
The Athens Neutron Monitor Data Processing (ANMODAP) Center recorded an unusual Forbush decrease with a sharp enhancement of cosmic ray intensity right after the main phase of the Forbush decrease on 16 July 2005, followed by a second decrease within ...
A. Hillaris, A. Papaioannou, Bastian, Bougeret, C. Caroubalos, Caroubalos, E. Mitsakou, H. Mavromichalaki, Kerdraon, Kontogeorgos, Kontogeorgos, Loewe, Mavromichalaki, Mavromichalaki, Miroshnichenko, P. Preka-Papadema, Papaioannou, X. Moussas, Yashiro   +18 more
core   +1 more source

Superposition of Doppler‐Shifting Magnetopause Kelvin‐Helmholtz Modes Through Dynamic Mode Decomposition of a Global MHD Simulation

Geophysical Research Letters, Volume 53, Issue 10, 28 May 2026.
Abstract The Kelvin‐Helmholtz instability (KHI) mediates the viscous‐like solar‐terrestrial interaction by generating magnetopause surface waves that quickly become non‐linear. Basic theory predicts the locally most‐unstable linear wave dominates.
H. M. Kelly, M. O. Archer, J. P. Eastwood, M. Heyns, J. W. B. Eggington, J. P. Chittenden   +5 more
wiley   +1 more source

Characteristics of Solar Wind Density Depletions During Solar Cycles 23 and 24 [PDF]

Journal of Astronomy and Space Sciences, 2017
Solar wind density depletions are phenomena that solar wind density is rapidly decreased and keep the state. They are generally believed to be caused by the interplanetary (IP) shocks.
Keunchan Park, Jeongwoo Lee, Yu Yi, Jaejin Lee, Jongdae Sohn   +4 more
doaj   +1 more source

Turbulence Upstream and Downstream of Interplanetary Shocks

Frontiers in Physics, 2021
The paper reviews the interaction of collisionless interplanetary (IP) shocks with the turbulent solar wind. The coexistence of shocks and turbulence plays an important role in understanding the acceleration of particles via Fermi acceleration mechanisms,
A. Pitňa, J. Šafránková, Z. Němeček, T. Ďurovcová, A. Kis   +4 more
doaj   +1 more source

LEO‐DOS Absorbed Dose Observations During the May 2024 Geomagnetic Superstorm

Geophysical Research Letters, Volume 53, Issue 10, 28 May 2026.
Abstract The Low‐Earth Orbit Space Radiation Dosimeter (LEO‐DOS) onboard Next‐Generation Satellite II (NEXTSat‐2) measured absorbed dose rate variations during the May 2024 geomagnetic superstorm. The observations show deep storm‐time penetration of solar energetic particle (SEP) spanning L ≈ 2–10, a pronounced enhancement near L ≈ 3 consistent with ...
Jongil Jung, Young‐Sil Kwak, Uk‐Won Nam, Suyeon Oh, Won‐Kee Park, Sukwon Youn, Jaeyoung Kwak, Jongdae Sohn, Bongkon Moon, Jaejin Lee, Sunghwan Kim, Sung‐Joon Ye   +11 more
wiley   +1 more source

Turbulence and Polytropic Changes across Interplanetary Shocks Observed by the Parker Solar Probe

The Astrophysical Journal Letters
Interplanetary shocks play a critical role in solar wind dynamics, influencing the properties of turbulence and thermodynamic processes. In this study, we statistically analyze changes in turbulence characteristics and polytropic indices across 37 quasi ...
Yiming Jiao, Lingling Zhao, Xingyu Zhu, Ashok Silwal, Nibuna S. M. Subashchandar, Zeping Jin   +5 more
doaj   +1 more source

Interpretation of Flat Energy Spectra Upstream of Fast Interplanetary Shocks

The Astrophysical Journal, 2023
Interplanetary shocks are large-scale heliospheric structures often caused by eruptive phenomena at the Sun, and represent one of the main sources of energetic particles.
Silvia Perri, Giuseppe Prete, Gaetano Zimbardo, Domenico Trotta, Lynn B. Wilson III, David Lario, Sergio Servidio, Francesco Valentini, Joe Giacalone   +8 more
doaj   +1 more source

Interplanetary shocks lacking type II radio bursts

, 2010
We report on the radio-emission characteristics of 222 interplanetary (IP) shocks. A surprisingly large fraction of the IP shocks (~34%) is radio quiet (i.e., the shocks lacked type II radio bursts).
Burgess, Cliver, Gopalswamy, Gopalswamy, Gopalswamy, Gopalswamy, Gopalswamy, Gopalswamy, Gopalswamy, Gopalswamy, Gopalswamy, Gopalswamy, Gopalswamy, H. Xie, Ho, J.-L. Bougeret, Lepping, M. L. Kaiser, Mann, Mäkelä, N. Gopalswamy, Nelson, Neugebauer, P. Mäkelä, R. A. Howard, S. Akiyama, S. Yashiro, Vourlidas   +27 more
core   +3 more sources