Results 51 to 60 of about 1,198,926 (208)

Optimization Algorithm for Determining the Source Surface Radius Based on Parker Solar Probe In Situ Measurements From Encounters 1 to 19

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 4, August 2026.
Abstract The Potential Field Source Surface (PFSS) extrapolation is a method for estimating the large scale coronal magnetic field from photospheric magnetograms. The source surface serves as the outer boundary of its solution domain, and is typically a spherical surface.
Shiouhe Wang, Fang Shen, Yi Yang, Xueshang Feng, Jiansen He   +4 more
wiley   +1 more source

A Community Data Set for Comparing Automated Coronal Hole Detection Schemes

The Astrophysical Journal Supplement Series
Automated detection schemes are nowadays the standard approach for locating coronal holes in extreme-UV images from the Solar Dynamics Observatory (SDO). However, factors such as the noisy nature of solar imagery, instrumental effects, and others make it
Martin A. Reiss, Karin Muglach, Emily Mason, Emma E. Davies, Shibaji Chakraborty, Veronique Delouille, Cooper Downs, Tadhg M. Garton, Jeremy A. Grajeda, Amr Hamada, Stephan G. Heinemann, Stefan Hofmeister, Egor Illarionov, Robert Jarolim, Larisza Krista, Chris Lowder, Erwin Verwichte, Charles N. Arge, Laura E. Boucheron, Claire Foullon, Michael S. Kirk, Alexander Kosovichev, Andrew Leisner, Christian Möstl, James Turtle, Astrid Veronig   +25 more
doaj   +1 more source

The impact of coronal hole characteristics and solar cycle activity in reconstructing coronal holes with EUHFORIA

Journal of Physics: Conference Series, 2020
Abstract Modelling with high accuracy the open magnetic field and the fast solar wind in the heliosphere is essential for space weather forecasting purposes. Primary sources of open magnetic field flux are Coronal Holes (CH), uni-polar regions that appear as dark patches in the solar corona when observed in X-ray and extreme-ultraviolet (
Asvestari, E., Heinemann, S.G., Temmer, M., Pomoell, J., Kilpua, E., Magdalenić, J., Poedts, Stefaan   +6 more
openaire   +2 more sources

Predicting Geomagnetic Activity in the Ascending and Declining Phases of the Solar Cycle

Space Weather, Volume 24, Issue 8, August 2026.
Abstract Most predictions of space climate, that is, the long‐term behavior of the solar‐terrestrial environment, have focused on forecasting the 11‐year sunspot cycle. Geomagnetic activity, on the other hand, has mainly been predicted in shorter, space weather timescales of up to days to weeks.
Timo Qvick, Timo Asikainen, Kalevi Mursula   +2 more
wiley   +1 more source

Topological structure of the magnetic solar corona [PDF]

, 2007
The solar corona is a highly complex and active plasma environment, containing many exotic phenomena such as solar flares, coronal mass ejections, prominences, coronal loops, and bright points.
Maclean, Rhona Claire
core   +2 more sources

Thermodynamic Evolution of Plumes

The Astrophysical Journal
Plumes are considered to play an important role in the origin of the solar wind. However, an understanding of their thermodynamic evolution is not complete. Here, we perform a detailed study of a plume inside a coronal hole throughout its lifetime, using
Biswanath Malaker, Vishal Upendran, Durgesh Tripathi   +2 more
doaj   +1 more source

Real‐Time Prediction of Two Geomagnetic Storms Using Solar Orbiter as a Far Upstream Solar Wind Monitor

Space Weather, Volume 24, Issue 8, August 2026.
Abstract We present the first real‐time predictions of coronal mass ejection (CME) magnetic structure and resulting geomagnetic impact at Earth for two events using far‐upstream observations from Solar Orbiter during March 2024. While our approach assumes idealized conditions for CME propagation and scaling, in situ magnetic field data from upstream ...
Emma E. Davies, Eva Weiler, Christian Möstl, Satabdwa Majumdar, Hannah T. Rüdisser, Timothy S. Horbury, Helen O'Brien, Jean Morris, Alastair Crabtree   +8 more
wiley   +1 more source

Estimating the Poynting Flux of Alfvénic Waves in Polar Coronal Holes across Solar Cycle 24

The Astrophysical Journal
Alfvénic waves are known to be prevalent throughout the corona and solar wind. Determining the Poynting flux supplied by the waves is required for constraining their role in plasma heating and acceleration, as well as providing a constraint for Alfvén ...
R. J. Morton, M. J. Weberg, N. Balodhi, J. A. McLaughlin   +3 more
doaj   +1 more source

Living Crystallization‐Driven Self‐Assembly: Entering an Era of Functional Customization

Aggregate, Volume 7, Issue 7, July 2026.
Living CDSA achieves fine regulation of nanostructures when adopting block copolymers as basic units. Researchers can realize functional customization by means of intrinsic design, exogenous modification, and surface engineering. The developed multifunctional nanomaterials find wide applications in catalysis, optoelectronics, and biomedicine.
Chenchen Gao, Yao Lu, Zhenyan Ji, Peiwen Wang, Xiaomin Cai, Jiawei Tao, Huibin Qiu   +6 more
wiley   +1 more source

Development and application of a global magnetic field evolution model for the solar corona [PDF]

, 2009
Magnetic fields are fundamental to the structure and dynamics of the Sun’s corona. Observations show them to be locally complex, with highly sheared and twisted fields visible in solar filaments/prominences.
Yeates, Anthony Robinson
core   +2 more sources