Results 41 to 50 of about 634 (193)

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

Collisionless Shocks: Contemporary State After Three Quarters of a Century of Research

Reviews of Geophysics, Volume 64, Issue 3, September 2026.
Abstract The collisionless shock research started in the late 1950s. Since then, plenty of data have been accumulated due to the large number of missions in the heliosphere, providing in situ measurements of the fields and particles. The quality of these measurements has vastly improved, especially in the last two decades.
M. Gedalin, M. Balikhin, V. Krasnoselskikh   +2 more
wiley   +1 more source

Diffusion Coefficients of WIND/STICS Protons from Diffusive Shock Acceleration with Finite Escape Boundaries

The Astrophysical Journal
Heliospheric suprathermal ions include inner-source pickup ions, cometary ions, solar energetic particles, and suprathermal tail particles. Despite exhaustive observation and formalisms, their role in interplanetary shock acceleration has yet to be ...
Johann R. Mejia-Ott, Brent M. Randol
doaj   +1 more source

Interplanetary Shocks between 0.3 and 1.0 au: Helios 1 and 2 Observations

The Astrophysical Journal, 2023
The Helios 1 (H1) and Helios 2 (H2) spacecraft measured the solar winds at a distance between ∼0.3 and 1.0 au from the Sun. With increasing heliocentric distance ( r _h ), the plasma speed is found to increase at ∼34–40 km s ^−1 au ^−1 and the density ...
Rajkumar Hajra, Bruce T. Tsurutani, Gurbax S. Lakhina, Quanming Lu, Aimin Du, Lican Shan   +5 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

TRACERS Small‐Scale Field‐Aligned Currents and Intense GPS Amplitude and Phase Scintillations in the Nightside Auroral Region

Geophysical Research Letters, Volume 53, Issue 14, 28 July 2026.
Abstract We present conjugate observations of ionospheric small‐scale magnetic perturbations (dB) $(dB)$ and GPS scintillations from the Tandem Reconnection and Cusp Electrodynamics Reconnaissance Satellites (TRACERS) and the Canadian High Arctic Ionospheric Network (CHAIN) during a storm‐time substorm on 9 August 2025 in the nightside auroral region ...
Yangyang Shen, Robert J. Strangeway, Hao Cao, James M. Weygand, Jiashu Wu, Anthony McCaffrey, P. T. Jayachandran, Daniel Billett, Magnus F. Ivarsen, Christopher Watson, Sheng Tian, Marit Oieroset, David Miles   +12 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

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

Pre‐Existing Plasmaspheric Density Structure

Geophysical Research Letters, Volume 53, Issue 14, 28 July 2026.
Abstract We perform a basic model experiment: we run two nearly identical plasmapause simulations, differing only by their initial conditions. The first run contains initial fine‐scale and mesoscale structure, and the second run is initialized with a featureless, circular plasmapause.
J. Goldstein, M. F. Thomsen
wiley   +1 more source

Martian Magnetotail Neutral Sheet Asymmetry Driven by Heavy Planetary Pickup Ions

Geophysical Research Letters, Volume 53, Issue 13, 16 July 2026.
Abstract In the induced magnetotail of Mars, the neutral sheet is an important channel for atmospheric ion escape, yet the role of heavy planetary pickup ions in shaping its geometry has been unclear. Using three‐dimensional hybrid simulations, we demonstrate that these ions induce a global neutral sheet asymmetry via mass loading.
Jingyi Zhou, Zhenpeng Su, Kaijun Liu, Rentong Lin, Esa Kallio, Riku Jarvinen, Yuming Wang   +6 more
wiley   +1 more source