Results 91 to 100 of about 9,642 (217)

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

SPECTRAL INDICES FOR MULTI-DIMENSIONAL INTERPLANETARY TURBULENCE AT 1 AU

The Astrophysical Journal, 2009
We examine Advanced Composition Explorer and Helios 1 data in search of evidence for an anisotropic spectrum of interplanetary magnetic and velocity field fluctuations. Specifically, we focus on the power-law indices of the fluctuation spectra and associated second-order structure functions and ask whether the index varies systematically with the angle
Jeffrey A. Tessein, Charles W. Smith, Benjamin T. MacBride, William H. Matthaeus, Miriam A. Forman, Joseph E. Borovsky   +5 more
openaire   +1 more source

Roles of Fast-Cyclotron and Alfven-Cyclotron Waves for the Multi-Ion Solar Wind

, 2012
Using linear Vlasov theory of plasma waves and quasi-linear theory of resonant wave-particle interaction, the dispersion relations and the electromagnetic field fluctuations of fast and Alfven waves are studied for a low-beta multi-ion plasma in the ...
A. Barnes, A. Osmane, B.D. Chandran, B.E. Goldstein, B.T. MacBride, C.W. Smith, E. Marsch, E. Marsch, E.N. Parker, F. Sahraoui, F. Sahraoui, G. Gogoberidze, J. He, J.C. Perez, J.J. Podesta, J.L. Kohl, J.V. Hollweg, M. Neugebauer, M. Neugebauer, Ming Xiong, P. Goldreich, P.A. Isenberg, R.J. Leamon, R.T. Wicks, S. Dasso, S.A. Markovskii, S.A. Markovskii, S.D. Bale, S.P. Gary, S.P. Gary, S.P. Gary, S.P. Gary, S.R. Cranmer, S.R. Cranmer, T.H. Stix, T.S. Horbury, W.A. Coles, W.H. Matthaeus, W.I. Axford, X. Li, X. Li, X. Li, Xing Li   +42 more
core   +1 more source

Toward a Dynamic Model for Topside Ionospheric Irregularities: Spherical Harmonic Decomposition

Space Weather, Volume 24, Issue 3, March 2026.
Abstract Ionospheric irregularities arise from highly dynamic and turbulent processes related to magnetosphere‐ionosphere coupling and can lead to electromagnetic signal distortion or loss of lock events in global navigation satellite system signals, representing a hazard associated with space weather events. For this reason, understanding and modeling
S. Mestici, P. De Michelis, G. Consolini, A. Pignalberi, R. Tozzi, F. Giannattasio, F. Berilli   +6 more
wiley   +1 more source

Calibrating Probabilistic Solar‐Wind Forecasts Driven by the Wang‐Sheeley‐Arge Model

Space Weather, Volume 24, Issue 3, March 2026.
Abstract By spatially perturbing coronal model output within a coupled coronal‐heliospheric model we can generate probabilistic predictions of solar‐wind speed. We apply these spatial perturbations to the Wang‐Sheeley‐Arge (WSA) model output to generate large sets of input conditions for the Heliospheric Upwind eXtrapolation with time dependence (HUXt)
N. O. Edward‐Inatimi, M. J. Owens, L. Barnard, H. Turner, M. Marsh, S. Gonzi, M. Lang   +6 more
wiley   +1 more source

Axial Flux Evolution of Small-scale Magnetic Flux Ropes from 0.06 to 10 au

The Astrophysical Journal Letters
Small-scale magnetic flux ropes (SMFRs) fill much of the solar wind, but their origin and evolution are debated. We apply our recently developed, improved Grad–Shafranov algorithm for the detection and reconstruction of SMFRs to data from Parker Solar ...
Hameedullah Farooki, Jeongwoo Lee, Francesco Pecora, Haimin Wang, Hyomin Kim   +4 more
doaj   +1 more source

Formation of H+ PUI Tails Downstream of Distant Interplanetary Shocks

The Astrophysical Journal
New Horizons’ Solar Wind Around Pluto (SWAP) instrument has observed interplanetary shocks from ∼20 to 60 au from the Sun. Different studies have analyzed the effects of these shocks on the solar wind ion (SWI) and interstellar pickup ion (PUI ...
E. J. Zirnstein, D. J. McComas, B. L. Shrestha, H. A. Elliott, P. C. Brandt, S. A. Stern, A. R. Poppe, J. Parker, E. Provornikova, K. Singer, A. Verbiscer, New Horizons Heliophysics Team   +11 more
doaj   +1 more source

TRANSPORT EQUATION FOR MHD TURBULENCE: APPLICATION TO PARTICLE ACCELERATION AT INTERPLANETARY SHOCKS

The Astrophysical Journal, 2009
The aim of the present paper is to unify the various transport equations for turbulent waves that are used in different areas of space physics. Here, we mostly focus on the magnetohydrodynamic turbulence, in particular the Alfvenic turbulence. The applied methods, however, are general and can be extended to other forms of turbulence, for example the ...
Sokolov, Igor V., Roussev, Ilia I., Skender, Marina, Gombosi, Tamas I., Usmanov, Arcadi V.   +4 more
openaire   +3 more sources

Effects of Waves on the Spectral Anisotropy of the Transition Range in Solar Wind Turbulence

The Astrophysical Journal
In the transition range of the solar wind turbulence, the magnetic spectrum has been observed to be strongly anisotropic with respect to the local mean field. However, the generation mechanism of the anisotropy remains not well understood.
Hua Zhang, Xin Wang, Haochen Yuan
doaj   +1 more source

Localized enhancements of energetic particles at oblique collisionless shocks

, 2015
We investigate the spatial distribution of charged particles accelerated by non-relativistic oblique fast collisionless shocks using three-dimensional test-particle simulations.
Fraschetti, Federico, Giacalone, Joe
core   +1 more source