Results 61 to 70 of about 1,261,581 (220)

Solar origins of solar wind properties during the cycle 23 solar minimum and rising phase of cycle 24

Journal of Advanced Research, 2013
The solar wind was originally envisioned using a simple dipolar corona/polar coronal hole sources picture, but modern observations and models, together with the recent unusual solar cycle minimum, have demonstrated the limitations of this picture.
Janet G. Luhmann, Gordon Petrie, Pete Riley   +2 more
doaj   +1 more source

SOLAR WIND AND CORONAL BRIGHT POINTS INSIDE CORONAL HOLES

The Astrophysical Journal, 2011
Observations of 108 coronal holes (CHs) from 1998-2008 were used to investigate the correlation between fast solar wind (SW) and several parameters of CHs. Our main goal was to establish the association between coronal bright points (CBPs; as sites of magnetic reconnection) and fast SW. Using in situ measurements of the SW, we have connected streams of
Nina V. Karachik, Alexei A. Pevtsov
openaire   +1 more source

Introduction to special issue on high speed solar wind streams and geospace interactions (HSS-GI) [PDF]

, 2009
This special issue of the Journal of Atmospheric and Solar-Terrestrial Physics is devoted to research into high speed solar wind streams (HSSs) and their effects on the region of near-Earth space commonly known as ‘geospace’.
Morley, S.K., Denton, M.H, Horne, Richard B, Borovsky, J.E., Tsurutani, B.T., Denton, M.H., Horne, R.B., McPherron, R.L.   +7 more
core   +1 more source

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

Optimizing the Density of Holes of EWT Solar Cells Taking Into Consideration Mechanical Aspects [PDF]

, 2011
EWT solar cells start from drilled wafers with approximately 100 holes/cm2. These holes act as stress concentrators leading to a reduction in the mechanical strength of this type of wafers.
Alarcón Álvarez, Enrique, Rey Llorente, Ignacio del, Hermanns, Lutz Karl Heinz, Fraile de Lerma, Alberto, Barredo Egusquiza, Josu   +4 more
core   +1 more source

Global Effect of New Active Regions on Coronal Holes and Their Wind Streams

The Astrophysical Journal
Solar wind prediction algorithms and simulations of coronal events often employ photospheric field maps that are assembled over a 27 day solar rotation. This has stimulated efforts to update and better synchronize the maps by applying flux transport and ...
Y.-M. Wang, K. J. Knizhnik, I. Ugarte-Urra, M. J. Weberg   +3 more
doaj   +1 more source

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

Solar wind from the coronal hole boundaries [PDF]

Journal of Geophysical Research: Space Physics, 2005
Recent studies using in situ observations established that the interface between fast and slow wind in interplanetary space has two distinct parts: a smoothly varying boundary layer flow that flanks fast wind from coronal holes and a sharper plasma discontinuity between intermediate and slow solar wind.
N. A. Schwadron, D. J. McComas, H. A. Elliott, G. Gloeckler, J. Geiss, R. von Steiger   +5 more
openaire   +1 more source

A turbulence-driven model for heating and acceleration of the fastwind 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 upward in the solar atmosphere. Scale-separated transport equations include large-scale
Dmitruk, Pablo, Matthaeus, William H., Dmitruk, P., M. Velli, Verdini, Andrea, Velli, Marco, Matthaeus, W. H., A. Verdini, Velli, M., Verli, M., Oughton, Sean, S. Oughton, Verdini, A., P. Dmitruk, W. H. Matthaeus, Oughton, S., Matthaeus, W.H.,

Dmitruk, P.

, Dmitruk, Pablo Ariel, Velli M., Verdini A., Matthaeus W. H., Dmitruk P., Oughton S.   +23 more
core   +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