Results 71 to 80 of about 9,560 (226)

Acceleration of an interplanetary shock through the magnetosheath: a global hybrid simulation

Frontiers in Astronomy and Space Sciences
According to most observations and simulations, interplanetary shocks slow down when they propagate through the magnetosheath. In this article, we present results from a self-consistent global hybrid PIC simulation of an interplanetary shock which, by ...
C. Moissard, C. Moissard, P. Savoini, D. Fontaine, R. Modolo   +4 more
doaj   +1 more source

Plasma Depletion and Mirror Waves Ahead of Interplanetary Coronal Mass Ejections

, 2006
We find that the sheath regions between fast interplanetary coronal mass ejections (ICMEs) and their preceding shocks are often characterized by plasma depletion and mirror wave structures, analogous to planetary magnetosheaths.
Badruddin, Bavassano Cattaneo, Bothmer, Burlaga, Chandrasekhar, Chew, Crooker, Crooker, Erkaev, Farrugia, Gary, Gary, Gary, Goldstein, Gosling, Gosling, Hammond, Hasegawa, Hau, Haurwitz, Hill, Hu, Hu, Ifedili, Isenberg, J. C. Kasper, J. D. Richardson, J. W. Belcher, Kasper, Kaufmann, Kivelson, Klein, Leamon, Lepping, Liu, Liu, Lopez, McComas, McComas, Mulligan, Neugebauer, Parker, Parks, Prager, Price, R. M. Skoug, Richardson, Richardson, Sonnerup, Southwood, Stasiewicz, Stix, Tsurutani, Violante, Viñas, Webb, Winterhalter, Y. Liu, Zurbuchen, Zwan   +59 more
core   +1 more source

Impact angle control of interplanetary shock geoeffectiveness [PDF]

Journal of Geophysical Research: Space Physics, 2014
AbstractWe use Open Geospace General Circulation Model global MHD simulations to study the nightside magnetospheric, magnetotail, and ionospheric responses to interplanetary (IP) fast forward shocks. Three cases are presented in this study: two inclined oblique shocks, hereafter IOS‐1 and IOS‐2, where the latter has a Mach number twice stronger than ...
Oliveira, D. M., Raeder, J.
openaire   +2 more sources

Modeling the Delivery of Mercury's Polar Ice by a Volatile‐Rich Impact

Journal of Geophysical Research: Planets, Volume 131, Issue 5, May 2026.
Abstract Permanently shadowed regions near Mercury's poles are thought to harbor significant deposits of water ice, the origin of which remains to be conclusively determined. One leading hypothesis is that most of the water observed today may have been delivered by a relatively recent, volatile‐rich impact comparable in scale and age to that which ...
Parvathy Prem, Nancy L. Chabot, Carolyn M. Ernst, Dana M. Hurley, David B. Goldstein, Jordan K. Steckloff   +5 more
wiley   +1 more source

Electron Heating in 2D Particle-in-cell Simulations of Quasi-perpendicular Low-beta Shocks

The Astrophysical Journal
We measure the thermal electron energization in 1D and 2D particle-in-cell simulations of quasi-perpendicular, low-beta ( β _p = 0.25) collisionless ion–electron shocks with mass ratio m _i / m _e = 200, fast Mach number ${{ \mathcal M }}_{\mathrm{ms}}=1$
Aaron Tran, Lorenzo Sironi
doaj   +1 more source

Transport of Water in a Transient, Impact‐Generated Atmosphere on Mercury

Journal of Geophysical Research: Planets, Volume 131, Issue 5, May 2026.
Abstract Mercury's polar cold traps host water ice deposits that are likely populated with impact‐delivered water via Mercury's exosphere. However, Mercury's near‐sun location experiences an extremely high photodestruction rate that rapidly destroys water with a timescale of only ∼3.5 hr.
J. K. Steckloff, D. B. Goldstein, P. L. Varghese, L. M. Trafton, P. Prem   +4 more
wiley   +1 more source

High-resolution Observations of Pickup-ion-mediated Shocks to 60 au

The Astrophysical Journal
This study provides a detailed analysis of 14 distant interplanetary shocks observed by the Solar Wind Around Pluto instrument on board New Horizons.
Bishwas L. Shrestha, David J. McComas, Eric J. Zirnstein, George Livadiotis, Heather A. Elliott, Pontus C. Brandt, Alan Stern, Andrew R. Poppe, Joel Parker, Elena Provornikova, Kelsi Singer, Anne Verbiscer, New Horizons Heliophysics Team   +12 more
doaj   +1 more source

On the solar origin of interplanetary disturbances observed in the vicinity of the Earth [PDF]

Annales Geophysicae, 2003
The solar origin of 40 interplanetary disturbances observed in the vicinity of the Earth between January 1997 and June 1998 is investigated in this paper.
N. Vilmer, M. Pick, R. Schwenn, P. Ballatore, J. P. Villain   +4 more
doaj   +1 more source

Impact Plasma Amplification of the Ancient Mercury Magnetic Field

Journal of Geophysical Research: Planets, Volume 131, Issue 5, May 2026.
Abstract Spacecraft measurements of Mercury indicate that it has a core dynamo with a surface field of 200–800 nT. These data also indicate that the northern hemisphere crust contains remanent magnetization likely produced by an ancient magnetic field. The inferred magnetization intensity is consistent with a wide range of paleofield strengths (0.2–50 ...
Isaac S. Narrett, Rona Oran, Yuxi Chen, Katarina Miljković, Gábor Tóth, Catherine L. Johnson, Benjamin P. Weiss   +6 more
wiley   +1 more source

Shock parameter calculations at weak interplanetary shock waves [PDF]

Annales Geophysicae, 2005
Abstract. A large set of interplanetary shock waves observed using the Ulysses spacecraft is analysed in order to determine their local parameters. For the first time a detailed analysis is extended to the thermodynamic properties of a large number of events. The intention is to relate the shock parameters to the requirements set by MHD shock theory. A
Gloag, J. M., Balogh, A.
openaire   +4 more sources