Results 51 to 60 of about 15,397 (165)

Modulation of Galactic Cosmic Rays in the Inner Heliosphere over Solar Cycles

, 2018
The 11-year and 22-year modulation of galactic cosmic rays (GCRs) in the inner heliosphere are studied using a numerical model developed by Qin and Shen in 2017.
Qin, G., Shen, Z. -N.
core   +1 more source

Reconstruction of Two‐Dimensional Magnetohydrodynamic and Hall Magnetohydrodynamic Equilibria in Space Using Physics‐Informed Neural Networks

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 2, April 2026.
Abstract We present a novel data analysis technique based on physics‐informed neural networks (PINNs) to reconstruct two‐dimensional (2D) magnetohydrodynamic (MHD) and Hall MHD equilibria in a space plasma from in situ spacecraft measurements. Our method incorporates the steady‐state MHD or Hall MHD equations—a set of partial differential equations ...
Hiroshi Hasegawa, Eunjin Choi, Kyoung‐Joo Hwang, Kyunghwan Dokgo   +3 more
wiley   +1 more source

The Boundary Conditions of the Heliosphere: Photoionization Models Constrained by Interstellar and In Situ Data

, 2007
The boundary conditions of the heliosphere are set by the ionization, density and composition of inflowing interstellar matter. Constraining the properties of the Local Interstellar Cloud (LIC) at the heliosphere requires radiative transfer ionization ...
Adams, Ajello, Altobelli, Altun, Anders, André, Bellm, Bertaux, Bloch, Bzowski, Bzowski, Cartledge, Cheng, Cowie, Cravens, Cummings, de Avillez, Dupuis, Ebel, Egger, Ferland, Field, Frisch, Frisch, Frisch, Frisch, Frisch, Frisch, Gloeckler, Gondhalekar, Grevesse, Gry, Gurnett, Henry, Holberg, Holweger, Hébrard, Izmodenov, J. D. Slavin, Juett, Kimura, Koutroumpa, Kruk, Lallement, Lallement, Lallement, Lallement, Lallement, Landgraf, Landsman, Lehner, Linsky, Lodders, Marschall, McCammon, McCammon, McClintock, McClintock, Meyer, Mitchell, Möbius, Müller, Oliveira, P. C. Frisch, Parravano, Pryor, Quémerais, Quémerais, Raymond, Redfield, Redfield, Richardson, Richardson, Ripken, Robertson, Rucinski, Sanders, Savage, Sembach, Simpson, Slavin, Slavin, Slavin, Smith, Snowden, Snowden, Snowden, Snowden, Snowden, Sofia, Stokes, Takei, Thomas, Vallerga, Vallerga, Wargelin, Weller, Welty, Witte, Witte, Wood, Wood, Wood, Wood, York, York   +105 more
core   +3 more sources

Why Coronal Mass Ejections Arrive Differently: Solar Cycle Modulation Through Solar Wind Structure

Space Weather, Volume 24, Issue 4, April 2026.
Abstract Coronal Mass Ejections (CMEs) are large structures of magnetized plasma ejected from the Sun's atmosphere into the heliosphere. The interaction of CMEs with the ambient solar wind during propagation affects arrival time and speed at Earth. Since the solar wind structure changes with the solar cycle, variability in the transit times and arrival
D. L. Gyeltshen, L. A. Barnard, M. J. Owens, P. Riley   +3 more
wiley   +1 more source

3D pressure-corrected ballistic extrapolation of solar wind speed in the inner heliosphere

Journal of Space Weather and Space Climate
Solar wind parameters at different locations in the inner heliosphere can be estimated using various solar wind extrapolation methods. The simple ballistic method extrapolates solar wind parameters from the point of measurement to a chosen heliospheric ...
Timar Aniko, Opitz Andrea, Nemeth Zoltan, Bebesi Zsofia, Biro Nikolett, Facskó Gábor, Koban Gergely, Madar Akos   +7 more
doaj   +1 more source

Implications of multiply-charged anomalous cosmic rays [PDF]

, 2006
During the acceleration of anomalous cosmic rays (ACRs) some singly-charged ions are stripped of additional electrons. The resulting multiply-charged ions are accelerated more efficiently, and most ACRs with >=30 MeV/nuc are multiply-charged.
Mewaldt, R. A.
core   +1 more source

Unraveling Super Equatorial Plasma Bubbles (EPBs) Evolution During the 23 April 2023 Storm: Multi‐Instrument Observations and GITM‐SAMI3 Simulation

Space Weather, Volume 24, Issue 4, April 2026.
Abstract Storm‐time equatorial plasma bubble (EPB) dynamics play a critical role in space weather impacts on communication and navigation systems, yet the mechanisms governing their formation and evolution under storm conditions remain poorly understood.
Shasha Zou, Yulu Peng, Mary Smirnova, Grace Kwon, Zihan Wang, Joseph Huba, Aaron Ridley   +6 more
wiley   +1 more source

Galactic Abundances: Report of Working Group 3 [PDF]

, 2001
We summarize the various methods and their limitations and strengths to derive galactic abundances from in-situ and remote-sensing measurements, both from ground-based observations and from instruments in space. Because galactic abundances evolve in time
Bothmer, V., Buclin, F., Christian, E. R., Cummings, A. C., Flückiger, E. O., George, J. S., Hofer, M. Y., Jones, F. C., Keller, J. W., Kirilova, D., Klecker, B., Kunow, H., Laming, M., Salerno, E., Sofia, U. J., Stone, E. C., Thielemann, F.-K., Tranquille, C., Wenzel, K.-P., Wiedenbeck, M. E.   +19 more
core   +1 more source

Post‐Processing Probabilistic Forecasts of the Solar Wind by Data Mining Similar Scenarios

Space Weather, Volume 24, Issue 4, April 2026.
Abstract The solar wind speed at Earth is one of the most important parameters regarding the effects of space weather on society. Thus far, most approaches for predicting the solar wind speed produce a single‐value time series without uncertainty, or utilize ensemble methods which require custom calibration development.
Daniel E. da Silva, Yash Parlikar, Shaela I. Jones, Charles N. Arge   +3 more
wiley   +1 more source

Solar Wind Forecasting for Long-term Variations of the Global Heliosphere

The Astrophysical Journal
The large-scale dynamics of the heliosphere is driven by solar activity and variable solar wind (SW) conditions. In situ SW observations inform time-dependent heliosphere modeling efforts but are only available up until the present day, thus restricting ...
Jonathan Gasser, Justyna M. Sokół, Maher A. Dayeh, Heather A. Elliott, Kelsi N. Singer, Merav Opher   +5 more
doaj   +1 more source