Results 81 to 90 of about 9,578 (225)

Energy Partition at a Collisionless Supercritical Quasi‐Parallel Shock

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract Shocks in collisionless astrophysical plasmas redistribute some of the incident flow energy into both thermal and non‐thermal energy. Quantifying the partition of that energy amongst various particle species or their sub‐populations, and electromagnetic energy, represents a fundamental goal of shock physics.
Steven J. Schwartz, Karlheinz J. Trattner, Savvas Raptis, Robert E. Ergun, Lynn B. Wilson III, Roman G. Gomez, Ian J. Cohen, Daniel J. Gershman, Katherine A. Goodrich, Harald Kucharek, Tien Vo   +10 more
wiley   +1 more source

Characterizing Ion‐Scale Fluctuations Around Dipolarization Fronts in Earth's Magnetotail

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract In the Earth's magnetotail bursty bulk flows are often associated with dipolarizing magnetic flux bundles. The leading edges of such earthward‐moving flux bundles are called dipolarization fronts (DF). In the present study we investigate the characteristics of ion‐scale oscillations embedded inside DFs, using observations from NASA's ...
M. Hosner, R. Nakamura, D. Schmid, E. V. Panov   +3 more
wiley   +1 more source

Propagation Velocities and Growth Rates of Short Large‐Amplitude Magnetic Structures (SLAMS) in the Foreshock of Earth

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract Short Large‐Amplitude Magnetic Structures (SLAMS) are believed to play important roles in the physics governing the formation of quasi‐parallel shocks. These isolated non‐linear structures, frequently observed in the foreshock, have been suggested to be building blocks for the shock and have been shown to drive shock reformation. In this work,
S. Bergman, T. Karlsson, T. K. Wong Chan
wiley   +1 more source

Exploring the Impact of Self-Excited Alfvén Waves on Transonic Winds: Applications in Galactic Outflows

Universe
The impact of cosmic rays is crucial to understand the energetic plasma outflows coming out from the Galactic centers against the strong gravitational potential well.
Bilal Ramzan, Syed Nasrullah Ali Qazi, Chung-Ming Ko   +2 more
doaj   +1 more source

On resistive dissipation of Alfvén waves in an isothermal atmosphere

International Journal of Mathematics and Mathematical Sciences, 1996
In this paper we will examine the reflection and dissipation of Alfvén waves, resulting from a uniform vertical magnetic field, in an inviscid, resistive and isothermal atmosphere.
H. Y. Alkahby
doaj   +1 more source

Parametric interactions between Alfven waves and sonic waves [PDF]

IEEE Transactions on Antennas and Propagation, 1973
Parametric interactions between a sonic pump wave and a weak Alfven wave are studied. It is shown that if the Alfven-wave velocity V_{A} is small relative to the sonic-wave velocity V_{s} there is a time-growing instability leading to the increase of the Alfven wave at the expense of the sonic wave.
openaire   +2 more sources

Compression of Mercury's Dayside Magnetopause to the Surface: A Three‐Dimensional Model of Magnetospheric Structure and Dynamics

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract We apply a hybrid model (kinetic ions, fluid electrons) to provide context for MErcury Surface Space ENvironment, GEochemistry, and Ranging (MESSENGER) observations of Disappearing Dayside Magnetosphere (DDM) events at Mercury. Such events have been observed on four occasions and are caused by Coronal Mass Ejections completely removing the ...
Georg Glebe, C. Michael Haynes, Sven Simon   +2 more
wiley   +1 more source

Poloidal Field Line Resonances Driven by a Fast Wave

Geophysical Research Letters
We present numerical simulations of the excitation of resonant poloidal Alfvén waves. The resulting Alfvén waves could be loosely described as “high‐m” (m is the azimuthal wave number) in as much as the azimuthal scale of the wave is much less than the ...
Andrew Wright, Thomas Elsden, Alexander Degeling, Ian R. Mann, Louis Ozeke, Timothy Yeoman, Jasmine Sandhu, Kazue Takahashi   +7 more
doaj   +1 more source

Energy Conversion Pathways Inside Kelvin‐Helmholtz Vortices

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract Energy transfer, cross‐scale coupling, and dissipation in astrophysical plasmas remain fundamental unresolved problems. The velocity‐shear–driven Kelvin–Helmholtz instability (KHI), ubiquitous in plasmas, is a key multiscale mechanism enabling plasma mixing, particle energization and the solar wind–magnetosphere coupling, making it a critical ...
A. Settino, Z. Vörös, L. Sorriso‐Valvo, C. Simon‐Wedlund, O. W. Roberts, R. Nakamura   +5 more
wiley   +1 more source

Characterization of Mercury's Atomic and Molecular Hydrogen Exosphere and the First Detection of H2 Ions

Journal of Geophysical Research: Planets, Volume 131, Issue 3, March 2026.
Abstract From 1974 to 1975, the Mariner 10 spacecraft studied Mercury's environment during three flybys and detected hydrogen, helium, and possibly atomic oxygen in the exosphere using its ultraviolet spectrometer, but no molecular hydrogen. Based on the sensitivity of the occultation instrument, an upper limit for the H2 ${\mathrm{H}}_{2}$ surface ...
F. Weichbold, D. Schmid, H. Lammer, M. Volwerk, M. Scherf, N. V. Erkaev, A. Varsani, C. Simon Wedlund, C. Mazelle   +8 more
wiley   +1 more source