Results 41 to 50 of about 10,729 (219)

Magnetic Topology and Loop Statistics in Observed Coronal Holes Using Potential Field Modeling

The Astrophysical Journal
Potential field source surface (PFSS) models are widely used to study the solar corona and form the basis for solar wind forecasting, yet they often fail to reproduce observed properties of coronal holes.
Stephan G. Heinemann, Jens Pomoell, Manuela Temmer   +2 more
doaj   +1 more source

Temperature of the Polar Inner Heliosheath: Connection to Solar Activity

The Astrophysical Journal, 2023
We study the thermodynamics of the plasma protons in the polar regions of the inner heliosheath (IHS) and its connection with solar activity over solar cycle 24.
G. Livadiotis, D. J. McComas, E. J. Zirnstein   +2 more
doaj   +1 more source

Global Ionospheric TEC Variability: Long‐Term Spectral–Wavelet Analysis and Geomagnetic Storm Event Case Studies

Journal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.
Abstract This study investigates global ionospheric variability using Global Total Electron Content (GTEC), defined as the spatial average of daily averaged Global Ionospheric Maps derived from the International GNSS Service. The analysis spans from 2010 to 2024, covering Solar Cycle 24 and the rising phase of Solar Cycle 25, and incorporates ...
Ramadane Hamed Linjouom Nsangou, Y. Reuveni   +1 more
wiley   +1 more source

What Determines the Brightness of the Magnetically Open Solar Corona?: Insights from Three-dimensional Radiative Magnetohydrodynamic Simulations and Observations

The Astrophysical Journal
We investigate the relationship between solar coronal holes and open-field regions using three-dimensional radiative magnetohydrodynamic simulations combined with remote-sensing observations from the Solar Dynamics Observatory (SDO).
Haruhisa Iijima
doaj   +1 more source

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

What drives solar-EUV jets seen in equatorial coronal holes?

Results in Physics, 2016
Recent observations of jets in solar coronal holes that include multi-wavelength data such as EUV movies have shown that most of those jets are not driven in the way suggested by the standard model.
M.L. Adams, R.L. Moore
doaj   +1 more source

Coronal hole boundaries evolution at small scales: I. EIT 195 A and TRACE 171 A view

, 2009
We aim at studying the small-scale evolution at the boundaries of an equatorial coronal hole connected with a channel of open magnetic flux with the polar region and an `isolated' one in the extreme-ultraviolet spectral range.
Madjarska, M. S., Wiegelmann, T.
core   +1 more source

Can the Solar Wind be Driven by Magnetic Reconnection in the Sun's Magnetic Carpet? [PDF]

, 2010
The physical processes that heat the solar corona and accelerate the solar wind remain unknown after many years of study. Some have suggested that the wind is driven by waves and turbulence in open magnetic flux tubes, and others have suggested that ...
Adriaan A. van Ballegooijen, Amari, Antiochos, Antiochos, Aschwanden, Axford, Baker, Banaszkiewicz, Berger, Beveridge, Bruno, Bryans, Buchlin, Cadavid, Cairns, Camporeale, Cranmer, Cranmer, Cranmer, Cranmer, Crouch, De Pontieu, De Rosa, Edmondson, Edmondson, Fang, Feldman, Fisk, Giacalone, Goldbaum, Gudiksen, Guglielmino, Hagenaar, Hagenaar, Hagenaar, Hagenaar, Hagenaar, Hansteen, Harra, Hollweg, Isobe, Ito, Jiang, Keller, Kubo, Lionello, Lites, Livi, Longcope, Longcope, Lynch, Lynch, Martínez González, Matsumoto, Matthaeus, Moreno-Insertis, Morita, Nicol, Pariat, Parnell, Peter, Press, Priest, Pucci, Rast, Regnier, Rieutord, Savcheva, Schrijver, Schrijver, Schrijver, Schwadron, Scullion, Shibata, Shimojo, Shimojo, Shimojo, Simon, Simon, Stein, Steven R. Cranmer, Sánchez Almeida, Title, van Ballegooijen, van Ballegooijen, Verdini, Wang, Wang, Wang, Welsch, Yeates, Zhang   +91 more
core   +1 more source

The Pointing Error Due To Laser Propagation in Space Plasma for TianQin Gravitational Wave Detection

Space Weather, Volume 24, Issue 4, April 2026.
Abstract TianQin, a space‐borne gravitational wave observatory, is designed to detect gravitational‐wave signals via laser interferometry. As the inhomogeneous space plasma surrounds the inter‐satellite laser links, the propagation of the laser in space plasma can introduce pointing error noise.
Shenwei Zhou, Wei Su, Shiyuan Zhou, Chaofan Li, Jixiang Zhang   +4 more
wiley   +1 more source

Validation of Long-term Solar Coronal Modeling Using FORWARD

The Astrophysical Journal Supplement Series
This research aims to evaluate the capabilities of two of the most widely used coronal models over multiple solar cycles and to study variations in solar coronal structures over an extended period across multiple channels. We have created a comprehensive
Gergely Koban, Judit Szente, Bart van der Holst, Gabor Toth, Enrico Landi   +4 more
doaj   +1 more source