Results 81 to 90 of about 288 (182)

The IMF Clock Angle Effect on the Tail Cross Section of the Martian Magnetic Pileup Boundary and Bow Shock

The Astrophysical Journal
Using a three-dimensional global magnetohydrodynamic (MHD) simulation model, we investigate the effects of different interplanetary magnetic field (IMF) clock angles on the tail configuration of the Martian magnetic pileup boundary (MPB) and bow shock ...
Y. K. Yuan, M. Wang, J. Y. Lu, J. H. Chen, N. Cheng   +4 more
doaj   +1 more source

MMS Observations of Multi‐Species Wave‐Particle Interactions and Rapid Foreshock Evolution

Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.
Abstract The ion foreshock is the region upstream of Earth's bow shock where magnetic field lines connect to the quasi‐parallel shock surface. Within this region, there exist a variety of backstreaming ion populations from the shock ramp that can generate ultra‐low frequency (ULF) waves through wave‐particle interactions. In this work, we use data from
Guan Le, Xochitl Blanco‐Cano, Yuxi Chen, Megha Pandya, Gangkai Poh, Hanying Wei, Scott Boardsen, Poshan Belbase, Christopher T. Russell, Daniel J. Gershman, Ian J. Cohen, S. A. Fuselier   +11 more
wiley   +1 more source

SDSO 1 is a Shocked Ghost Planetary Nebula in Front of M 31

The Astrophysical Journal
We present new, deep narrowband imagery and discuss the nature of SDSO 1, the large [O iii ]-emitting nebula centered $1\mathop{.}\limits^{^\circ }5$ SE of M 31.
Patrick Ogle, Mark Petersen, R. Michael Rich, Tim Schaeffer, Lewis McCallum, Alberto Noriega-Crespo, Biny Sebastian, Carl Björk, Steeve Body, Sendhil Chinnasamy, Marcel Drechsler, Tarun Kottary, Yann Sainty, Patrick Sparkman, Xavier Strottner   +14 more
doaj   +1 more source

Excitation of Large Amplitude Compressional ULF Waves in the Magnetosphere by Solar Wind Pressure Spikes and IMF Southward Turning

Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.
Abstract We present a case study of large amplitude, compressional Pc5 waves observed by GOES 13 and 15 at geosynchronous orbit near noon. These waves were excited near the arrival time of two consecutive solar wind dynamic pressure spikes at the magnetopause, the second of which was associated with a large and rapid southward turning of the ...
C. Lazzeri, C. Forsyth, A. Samsonov, A. Fazakerley, M. Archer, T. Elsden, K. J. Trattner, J. Rae, A. W. Degeling   +8 more
wiley   +1 more source

ML‐EPM: A Machine Learning Model of Auroral Electron Precipitation Spectra Using Long‐Term DMSP Observations

Space Weather, Volume 24, Issue 8, August 2026.
Abstract Auroral precipitation plays a key role in coupling the Magnetosphere–Ionosphere–Thermosphere system by modifying ionospheric conductance, currents, atmospheric heating, and upper‐atmospheric dynamics. Leveraging 17 years of electron spectrum data from the Defense Meteorological Satellite Program (DMSP), we developed a Machine Learning‐based ...
V. Sai Gowtam, Hyunju Connor
wiley   +1 more source

Reconnection along a Separator in Shock Turbulence

The Astrophysical Journal
Numerous structures conducive to magnetic reconnection are frequently observed in the turbulent regions at quasi-parallel shocks. In this work, we use a particle-in-cell simulation to study 3D magnetic reconnection in shock turbulence.
J. Ng, N. Bessho, J. T. Dahlin, L.-J. Chen   +3 more
doaj   +1 more source

Quantifying Uncertainty in OMNI Solar Wind Measurements Projected From L1 to the Earth's Bow Shock

Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.
Abstract Many routine measurements of the solar wind plasma and interplanetary magnetic field (IMF) are made at the L1 Sun–Earth Lagrange point; therefore, it is helpful to characterize the errors introduced in propagating these measurements to the near‐Earth environment.
N. C. Rogers, J. A. Wild, A. Grocott
wiley   +1 more source

Foreshock Ion Properties at Earth's Bow Shock: Dependence on Upstream Conditions and Shock Geometry

Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.
Abstract Solar wind ion reflection at collisionless shocks regulates foreshock plasma dynamics, yet the quantitative dependence of foreshock ion properties on upstream and shock‐related parameters remains unclear, causing difficulties in predicting foreshock disturbances.
Runyi Liu, Terry Liu, Kun Zhang, Vassilis Angelopoulos, Siqi Zhao   +4 more
wiley   +1 more source

The Importance of Heat Flux in Low-Mach-number, Quasi-parallel Collisionless Shocks

The Astrophysical Journal
Collisionless plasma shocks are a common feature of many space and astrophysical systems. They are sources of high-energy particles and nonthermal emission, channeling as much as 20% of the shock’s energy into nonthermal particles.
Colby C. Haggerty, Damiano Caprioli, Paul A. Cassak, M. Hasan Barbhuiya, Lynn Wilson III, Drew L. Turner   +5 more
doaj   +1 more source

Low Frequency Extensions of Cyclotron Maser Instability‐Generated Radio Emission: A Statistical View From Cassini at Saturn

Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.
Abstract The Cassini spacecraft spent 13 years orbiting Saturn, quasi‐continuously measuring Saturn's radio emissions. One of the key elements of the radio spectrum at Saturn is the Saturn Kilometric Radiation (SKR), and several studies have been written on events called Low Frequency Extensions (LFEs) which represent strong, continuous extensions of ...
C. M. Jackman, A. R. Fogg, S. W. H. Cowley, G. Provan, H. Adamski, N. M. Besch, D. M. Hollman, S. Walker, M. J. Rutala, L. Lamy, C. K. Louis, E. P. O’Dwyer   +11 more
wiley   +1 more source