Results 61 to 70 of about 716 (136)

Quasi‐Periodic X‐Ray Variations at BARREL: Role of Electron Precipitation and Solar Wind Driving

Journal of Geophysical Research: Space Physics, Volume 131, Issue 7, July 2026.
Abstract The Balloon Array for Radiation belt Relativistic Electron Losses (BARREL) mission was designed to study the loss of radiation belt electrons to the upper atmosphere. Previous analysis of data from balloon pairs showed that electron precipitation events manifest coherent quasi‐periodic variations (with periodicity on the order of 10–60 min ...
S. Di Matteo, A. W. Breneman, A. J. Halford, N. M. Viall, L. Kepko, K. Cantwell, R. Millan   +6 more
wiley   +1 more source

Capturing Secondary Kinetic Instabilities in Three‐Dimensional Dayside Reconnection Using an Improved Gradient‐Based Closure

Journal of Geophysical Research: Space Physics, Volume 131, Issue 7, July 2026.
Abstract Magnetic reconnection is a highly dynamic process that excites a wide variety of kinetic waves and instabilities. Transverse current sheet instabilities such as the lower‐hybrid drift and secondary drift‐kink instabilities in particular have been shown by kinetic simulations to modify the reconnection and introduce significant turbulence and ...
K. Bradshaw, A. H. Hakim, J. Juno, J. Pawlak, J. M. TenBarge, A. Bhattacharjee   +5 more
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

Inertial Alfvén Waves With Magnetosphere‐Ionosphere Coupling and Feedback

Journal of Geophysical Research: Space Physics, Volume 131, Issue 7, July 2026.
Abstract We present a theory of the ionospheric feedback instability (IFI) in which the finite‐thickness h $h$ of the ionosphere is represented by a frequency‐ and scale‐dependent height‐integrated Pedersen conductance, YI≡∑inΩ,k⊥,h, ${Y}_{\mathrm{I}}\equiv {\mathrm{\sum }}_{\text{in}}\left({\Omega },{k}_{\perp },h\right),$ electromagnetically coupled ...
R. Rankin, Q.‐G. Zong, W. Wang
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

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

Johan Svendsen and Two‐Dimensional Sonata Form

Music Analysis, Volume 45, Issue 2, Page 177-212, July 2026.
ABSTRACT This article discusses progressive formal strategies in the music of Johan Svendsen (1840–1911). Svendsen is one of Norway's foremost composers of large‐scale orchestral music, but his works have so far garnered scant attention in Anglophone scholarship.
BJØRNAR UTNE‐REITAN
wiley   +1 more source

Observing the Earth's Plasmasphere and Ionosphere From the Lunar Surface

Geophysical Research Letters, Volume 53, Issue 12, 28 June 2026.
Abstract We present the analysis of the first lunar‐based observational characterization of the Earth's plasmasphere and ionosphere using Global Navigation Satellite Systems signals tracked from the lunar surface by the Lunar GNSS Receiver Experiment (LuGRE). The Earth‐Moon geometry enables limb sounding of the plasmasphere at altitudes exceeding 3,000 
C. Cesaroni, L. Spogli, M. Guerra, R. Ghidoni, V. Ventriglia, A. Minetto, A. Nardin, L. Alfonsi, F. Dovis   +8 more
wiley   +1 more source

The Energy Content of Alfvén Waves in the Stratified Solar Atmosphere

The Astrophysical Journal
Alfvén waves propagating in a vertically stratified plasma, such as those traveling from the solar photosphere to the corona, are partially reflected due to the gradient in the Alfvén speed.
Roberto Soler
doaj   +1 more source

Condition of Alfven Gauss wave-packet evolvement to solitons and criterion of Alfven wave modulation instability

Acta Physica Sinica, 2003
By analyzing the integral constant C1 of Alfven solitons, the condition of Alfven Gaussian wave-packets evolvement to solitary waves is put forward as C1≤0. This hypothesis is also confirmed by numerical simulation results. Furthermore,simulation results show that the number of evolving solitons does not depend only on integral constant C0 or C1.
null Zhang Jie-Qiu, null Liang Chang-Hong, null Wang Geng-Guo, null Zhu Jia-Zhen   +3 more
openaire   +1 more source