Results 81 to 90 of about 860 (219)
, 1987 In this paper we explore techniques to identify sources of electric current systems and their channels of flow in solar active regions. Measured photospheric vector magnetic fields (VMF) together with high-resolution white-light and H filtergrams provide
Ding YJ +5 more
core +1 more source
Slow Solar Wind: Origin in an Independent Small‐Scale Solar Dynamo
Geophysical Research Letters, Volume 52, Issue 13, 16 July 2025.Abstract Separation of the solar wind (SW) into three flow types (coronal mass ejections (CMEs), high speed streams (HSSs), and slow solar wind (SSW)) reveals an inverse relationship between the percentage of time Earth spends in SSW during a year and its annually averaged magnetic field strength (B).
E. W. Cliver +2 more
wiley +1 more source
Solar flux emergence : a three-dimensional numerical study
, 2008 Flux is continually emerging on the Sun, making its way from the solar interior up into the atmosphere. Emergence occurs on small-scales in the quiet Sun where magnetic fragments emerge, interact and cancel and on large-scales in active regions where ...
Murray, Michelle J.
core
Active chromospheric fibril singularity
Astronomy & AstrophysicsContext. The fine structures of the solar chromosphere, driven by photospheric motions, play a crucial role in the dynamics of solar magnetic fields. Many such structures have already been identified, such as fibrils, filament feet, and arch filament systems.
Reetika Joshi +8 more
openaire +2 more sources
NOAA's National Centers for Environmental Information Space Weather Data Inventory Status
Space Weather, Volume 23, Issue 7, July 2025.Abstract We present here an updated overview of the Space Weather data curated and/or generated, improved, archived, and disseminated by the Solar Terrestrial Physics (STP) Section of the National Centers for Environmental Information (NCEI) in the National Oceanic and Atmospheric Administration (NOAA).
Alessandra Abe Pacini +2 more
wiley +1 more source
Magnetohydrodynamic waves in structured atmospheres
, 2012 The effect of structuring, in the form of magnetic or density inhomogeneities, on the magnetohydrodynamic (mhd) waves of an infinite plasma is investigated.
Edwin, Patricia Mary
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Robust Statistical Techniques for Operational Maintenance of the 10.7 cm Solar Radio Flux
Space Weather, Volume 23, Issue 5, May 2025.Abstract The F10.7 solar radio flux is a critical quantity for operational space weather nowcasting and forecasting, where it is routinely used as a driver for coupled atmospheric models to estimate a variety of important quantities such as the neutral atmospheric density.
Daniel A. Brandt +2 more
wiley +1 more source
The tangential discontinuous surface of velocity in solar chromosphere
, 1991 The data of velocity and magnetic fields in the solar photosphere (5324 angstrom) and the chromosphere (4861 angstrom) clearly show the features of tangential discontinuity of velocity in the chromosphere.
HU, WR (reprint author), ACAD SINICA,INST MECH,BEIJING 100080,PEOPLES R CHINA. +3 more
core
IRIS2+: A Comprehensive Database of Stratified Thermodynamic Models in the Low Solar Atmosphere
The Astrophysical Journal Supplement SeriesWe present the most comprehensive collection of stratified-in-optical-depth thermodynamic models of the lower solar atmosphere. This database, named IRIS ^2+ , consists of 40,320 synthetic representative profiles (RPs) and their corresponding ...
Alberto Sainz Dalda +3 more
doaj +1 more source
Kinematics of chromospherically active late-type dwarfs in the solar neighborhood
The Astronomical Journal, 1990 The space motions of chromospherically active late-type dwarfs (solar-type stars, K and M dwarfs, and BY Draconis binaries) are illustrated and discussed. Except for a small number of deviant stars, all the active single stars have the kinematics of young stars (age about 0.5 Gyr). The most egregious exception is HD 152391, which appears to be a single
openaire +1 more source