Results 81 to 90 of about 16,769 (212)
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 +3 more
wiley +1 more source
The Astrophysical Journal LettersThe variability of helium abundance in the solar corona and the solar wind is an important signature of solar activity, solar cycle, and solar wind sources, as well as coronal heating processes.
Leon Ofman, Yogesh, Silvio Giordano
doaj +1 more source
Missing bits of the solar jigsaw puzzle: small-scale, kinetic effects in coronal studies
, 2009 The solar corona, anomalously hot outer atmosphere of the Sun, is traditionally described by magnetohydrodynamic, fluid-like approach. Here we review some recent developments when, instead, a full kinetic description is used. It is shown that some of the
Aschwanden +49 more
core +1 more source
Coronal Heating and the Solar Wind Acceleration [PDF]
Symposium - International Astronomical Union, 2001 We propose a coronal heating theory based on the magnetic twisting, which inevitably produces charge imbalance. The resulting electric field creates supra-thermal electron beams. Beams are then thermalized by classical collisions. The dissipation rate is enough to heat the corona and to accelerate the solar wind.
openaire +1 more source
Diagnostics of Coronal Heating in Solar Active Regions [PDF]
Symposium - International Astronomical Union, 2004 We study the relationship between EUV spectral line intensities and the photospheric magnetic field in solar active regions, using magnetograms from SOHO-MDI and EUV spectra of the Fe XVI 360.8 Â line (2 × 106 K) and the O V 629.7 A line (220,000 K) from the Coronal Diagnostic Spectrometer on SOHO, recorded for several active regions.
A. Fludra, J. Ireland
openaire +1 more source
Automatic Identification of Interplanetary Shocks Based on Machine Learning
Space Weather, Volume 24, Issue 4, April 2026.Abstract Fast forward interplanetary shocks (FFs) are one of the primary drivers of space weather events. This study presents an automated detection algorithm for FFs based on a multilayer perceptron model, utilizing in situ measurements of interplanetary magnetic fields and solar wind plasma from the Wind spacecraft at 1 AU.
Yi Tan +4 more
wiley +1 more source
The Astrophysical JournalThe solar corona is much hotter than the photosphere and chromosphere, but the physical mechanism responsible for heating the coronal plasma remains unidentified. The thermal microwave emission, which is produced in a strong magnetic field above sunspots,
Alexey A. Kuznetsov +3 more
doaj +1 more source
A turbulence-driven model for heating and acceleration of the fast wind in coronal holes [PDF]
, 2009 A model is presented for generation of fast solar wind in coronal holes, relying on heating that is dominated by turbulent dissipation of MHD fluctuations transported upwards in the solar atmosphere.
A. Verdini +24 more
core +8 more sources
Reconstructing Historical Solar Indices for Predicting Past Space Weather Events
Space Weather, Volume 24, Issue 4, April 2026.Abstract Modeling and forecasting the near‐Earth space environment, specifically the thermosphere, is particularly important because it affects the motion of low‐Earth orbit objects through atmospheric drag. Solar indices such as F10.7, S10.7, M10.7, and Y10.7 are commonly used as inputs to ionospheric and thermospheric density models.
Poshan Belbase +4 more
wiley +1 more source