Results 71 to 80 of about 9,578 (225)

Alfvén Wave Conversion and Reflection in the Solar Chromosphere and Transition Region

Physics, 2022
Series solutions are used to explore the mode conversion of slow, Alfvén and fast magnetohydrodynamic waves injected at the base of a two-isothermal-layer stratified atmosphere with a uniform magnetic field, crudely representing the solar chromosphere ...
Paul Cally
doaj   +1 more source

Imaging the Perpendicular Plasma Dynamics Driving a Discrete Auroral Arc

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract Measurements of motions and structuring in auroral luminosity are combined with magnetically connected plasma measurements from the Reimei spacecraft to image the perpendicular plasma dynamics active above a discrete auroral arc. It is demonstrated how the inversion of optical flow patterns specifies the potential structure above regions of ...
C. C. Chaston
wiley   +1 more source

The Uniturbulence and Alfvén Wave Solar Model (UAWSoM) in MPI-AMRVAC

Astronomy & Astrophysics
Context. The coronal heating problem and the generation of the solar wind remain fundamental challenges in solar physics. While approaches based on, e.g., the Alfvén Wave Solar Model (AWSoM) have proven highly successful in reproducing the large-scale ...
McMurdo M., Van Doorsselaere T., Magyar N., Banović L., Lim D.   +4 more
doaj   +1 more source

Phase mixing of standing Alfven waves with shear flows in solar spicules

, 2012
Alfvenic waves are thought to play an important role in coronal heating and solar wind acceleration. Here we investigate the dissipation of such waves due to phase mixing at the presence of shear flow and field in the stratified atmosphere of solar ...
A.C. Sterling, B. Pontieu De, E.K. Kaghashvili, E.R. Priest, G. Verth, H. Ebadi, H. Ebadi, H. Ebadi, H. Saleem, I. Moortel De, I. Moortel De, J. Heyvaerts, K. Karami, K. Murawski, M. Hosseinpour, P.D. Smith, S. Poedts, T.J. Okamoto, T.V. Zaqarashvili, T.V. Zaqarashvili, V. Kukhianidze   +20 more
core   +1 more source

Ion Energization and Acceleration Associated With Foreshock Bubbles: Results From a Hybrid‐Vlasov Simulation and MMS Observations

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract Foreshock Bubbles (FBs) are large‐scale transient structures found in Earth's foreshock region and are associated with foreshock‐discontinuity interaction. FBs play a significant role in accelerating and energizing plasma through various mechanisms.
Souhail Dahani, Lucile Turc, Veera Lipsanen, Shi Tao, Jonas Suni, Yann Pfau‐Kempf, Milla Kalliokoski, Minna Palmroth, Daniel Gershman, Roy Torbert, James Burch   +10 more
wiley   +1 more source

Generation of Alfven Waves by Magnetic Reconnection

, 2010
In this paper, results of 2.5-dimensional magnetohydrodynamical simulations are reported for the magnetic reconnection of non-perfectly antiparallel magnetic fields.
Kigure, Hiromitsu, Nozawa, Satoshi, Shibata, Kazunari, Takahashi, Kunio, Yokoyama, Takaaki   +4 more
core   +1 more source

MMS Observation of Trapping of Electrons by Chorus Waves Inside a Magnetic Hole

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract We present an event of chorus waves embedded within a magnetic hole (MH) in the Earth's magnetosheath, observed by the Magnetospheric Multi‐Scale (MMS) mission on 1 March 2016. Unlike conventional cases where chorus waves are typically detected near the center of a magnetic depression, in this event lower‐band chorus waves appear predominantly
Krushna C. Barik, Yoshiharu Omura, Satyavir Singh   +2 more
wiley   +1 more source

Induced Scattering and Two-Photon Absorption of Alfven Waves with Arbitrary Propagation Angles

, 2000
The equation for temporary evolution of spectral energy of collisionless Alfven waves is derived in framework of weak turbulence theory. The main nonlinear processes for such conditions are induced scattering and two quantum absorption of Alfven waves by
A. Achterberg, A. Achterberg, A. I. Akhiezer, J. A. Miller, K. N. Stepanov, M. A. Lee, M. A. Livshits, M. N. Rosenbluth, R. M. Kulsrud, V. N. Fedorenko, V. N. Tsytovich, V. N. Tsytovich, V. N. Zirakashvili   +12 more
core   +1 more source

Extending the Wave Telescope Technique to Larger Numbers of Spacecraft Obtaining Robust Spatial Power Spectra

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract The wave telescope is an analysis technique for multi‐point spacecraft data that estimates power spectra in reciprocal position space (k $k$‐space). It has been used to reveal the spatial properties of waves and fluctuations in space plasmas. Originally designed as an analysis tool for 4 spacecraft constellations, new multi‐scale missions such
L. Schulz, K.‐H. Glassmeier, L. Turc, F. Plaschke, K. G. Klein, M. Palmroth, O. W. Roberts, Y. Narita   +7 more
wiley   +1 more source

Three-dimensional numerical simulations of fast-to-Alfven conversion in sunspots

, 2012
The conversion of fast waves to the Alfven mode in a realistic sunspot atmosphere is studied through three-dimensional numerical simulations. An upward propagating fast acoustic wave is excited in the high-beta region of the model.
Avrett, Bogdan, Bray, Cally, Felipe, Hansen, Hasan, Khomenko, Khomenko, Khomenko, Khomenko, Khomenko, Khomenko, Mihalas, Parchevsky, Rosenthal, T. Felipe, Uchida   +17 more
core   +1 more source