Results 21 to 30 of about 306,228 (194)

Suprathermal Population Associated with Stream Interaction Regions Observed by STEREO-A: New Insights

The Astrophysical Journal, 2023
Stream interaction regions (SIRs) are often thought to be responsible for the generation of suprathermal population in the interplanetary medium. Even though the source is the same, wide variations in the spectral indices of suprathermal populations are ...
Bijoy Dalal, Dibyendu Chakrabarty, Nandita Srivastava, Aveek Sarkar   +3 more
doaj   +1 more source

VARIATIONS OF FLOW DIRECTION IN SOLAR WIND STREAMS OF DIFFERENT TYPES

Solar-Terrestrial Physics, 2021
Studying the direction of the solar wind flow is a topical problem of space weather forecasting. As a rule, the quiet and uniform solar wind propagates radially, but significant changes in the solar wind flow direction can be observed, for example, in ...
A.V. Moskaleva, M.O. Riazantseva, Yu.I. Yermolaev, I.G. Lodkina   +3 more
doaj   +1 more source

Statistics of counter-streaming solar wind suprathermal electrons at solar minimum : STEREO observations [PDF]

, 2010
Previous work has shown that solar wind suprathermal electrons can display a number of features in terms of their anisotropy. Of importance is the occurrence of counter-streaming electron patterns, i.e., with "beams" both parallel and anti-parallel to ...
Skoug, R. M., C. Mazelle, A. Opitz, E. Penou, Penou, E., C. Jacquey, Génot, Vincent, Larson, D. E., Jian, L., Sauvaud, J.-A., Fedorov, A., P. Schroeder, R. M. Skoug, Jacquey, C., K. D. Simunac, Meziane, K., Russell, C. T., Lavraud, B., C. Foullon, Foullon, C., J.-A. Sauvaud, Sauvaud, Jean-André, I. Dandouras, Rouillard, A. P., Génot, V., Luhmann, J. G., J. T. Gosling, C. T. Russell, J. T. Steinberg, Foullon, C. (Claire), A. B. Galvin, Opitz, A., Simunac, K. D., K. Meziane, Mazelle, C., A. Fedorov, Galvin, A. B., J. G. Luhmann, P. Louarn, Russell, C. T. (Christopher T.), Steinberg, John Tyree, D. E. Larson, Dandouras, I., Steinberg, J. T., A. P. Rouillard, Schroeder, P., Gosling, J. T., L. Jian, Louarn, P., V. Génot, B. Lavraud   +50 more
core   +2 more sources

Primal SPH Solver for Strongly Coupled Multiphase Simulations with High Density Ratios

Computer Graphics Forum, EarlyView.
Abstract In recent years, the Smoothed Particle Hydrodynamics (SPH) approach has been increasingly used for multiphase simulations involving interactions between diverse materials. A critical component of an SPH simulator is the pressure solver, which not only facilitates the simulation of compressible or incompressible fluids but also handles contact ...
Jan Bender, Stefan Rhys Jeske, Timna Böttcher, Fabian Löschner   +3 more
wiley   +1 more source

The Radial Variation of Suprathermal Particles in Stream Interaction Regions: Comparisons between Solar Orbiter, ACE, and STEREO-A

The Astrophysical Journal
With the launch of Solar Orbiter, the intensity and composition of suprathermal particles have been sampled within the inner heliosphere at distances between ∼0.3 and 1 au.
Robert C. Allen, George C. Ho, Glenn M. Mason, Athanasios Kouloumvakos, Gang Li, Rachael J. Filwett, Maher Dayeh, Malik H. Walker, Sarah K. Vines, Robert F. Wimmer-Schweingruber, Javier Rodriguez-Pacheco   +10 more
doaj   +1 more source

Schumann Resonance Frequency Increase Following Recurrent Solar Wind Stream Onsets

Earth and Space Science, Volume 13, Issue 10, October 2026.
Abstract Recurrent high‐speed streams and corotating interaction regions (HSS/CIRs) are common solar‐wind drivers, but their influence on Schumann resonance (SR) frequencies remains poorly quantified. We analyzed 173 threshold‐defined HSS/CIR proxy onsets using superposed epoch composites, bootstrap uncertainty, and a month‐matched random‐epoch null ...
J. Tacza, G. Sátori, A. Neska, T. Raita, T. Bozoki   +4 more
wiley   +1 more source

Corotating high‐speed solar‐wind streams and recurrent cosmic ray modulation [PDF]

Journal of Geophysical Research: Space Physics, 2007
We studied the solar magnetic cycle dependence of cosmic ray depressions due to the corotating high‐speed solar wind streams (CSWS) during different polarity states of the heliosphere. The daily averaged cosmic ray intensity data from Climax, Oulu, and Thule neutron monitors together with simultaneous solar wind plasma and field data were subjected to ...
Y. P. Singh, null Badruddin
openaire   +1 more source

Polytropic Behavior in Corotating Interaction Regions: Evidence of Alfvénic Heating

The Astrophysical Journal Letters
Corotating interaction regions (CIRs) are recurring structures in the solar wind, characterized by interactions between fast and slow solar wind streams that compress and heat plasma. This study investigates the polytropic behavior of distinct regions in
M. A. Dayeh, M. J. Starkey, G. Livadiotis, S. T. Hart, A. A. Shmies, R. C. Allen, R. Bučik, H. A. Elliott   +7 more
doaj   +1 more source

Solar cycle variations of the energetic H/He intensity ratio at high heliolatitudes and in the ecliptic plane [PDF]

Annales Geophysicae, 2003
We study the variability of the heliospheric energetic proton-to-helium abundance ratios during different phases of the solar cycle. We use energetic particle, solar wind, and magnetic field data from the Ulysses, ACE and IMP-8 spacecraft to ...
D. Lario, E. C. Roelof, R. B. Decker, G. C. Ho, C. G. Maclennan, J. T. Gosling   +5 more
doaj   +1 more source

Earthward O+ Injections in the Plasma Sheet Boundary Layer During Geomagnetic Storms

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract During geomagnetic storms, energetic ions are injected from the Earth's magnetotail along the plasma sheet boundary layer (PSBL). Owing to its off‐equatorial inclined orbit, the Arase satellite is in a prime position to observe these injections in the PSBL on the nightside at the apogee.
M. M. H. Kalliokoski, L. M. Kistler, K. Asamura, S. Kasahara, Y. Miyoshi, K. Keika, T. Hori, A. Matsuoka, K. Yamamoto, J. Liao   +9 more
wiley   +1 more source