Results 121 to 130 of about 2,789 (225)

Source Materials and Heating of Alfvénic Slow and Hot Solar Wind Revealed by Heavy Ions

The Astrophysical Journal
This work quantitatively studies the differences of heavy ions among non-Alfvénic slow wind (N-ASSW), classical fast wind (FSW), and Alfvénic slow and hot wind (ASSW and AHSW) by effect size and Kolmogorov–Smirnov statistic.
Shuyi Meng, Shuo Yao
doaj   +1 more source

Thread Separation and Expansion Observed in Multistranded Solar Coronal Loops

The Astrophysical Journal
The theoretical expectation that coronal loops should expand with height contrasts with observations that typically show constant cross sections. We investigate the idea that this discrepancy results from loops being composed of fine threads whose ...
David H. Brooks, Harry P. Warren
doaj   +1 more source

Coronal Alfvén speeds in an isothermal atmosphere

, 2008
Aims. Estimating Alfvén speeds is of interest in modelling the solar corona, studying the coronal heating problem and understanding the initiation and propagation of coronal mass ejections (CMEs). Methods.
E. R. Priest, Hood, Alan William, Régnier, S., Priest, Eric Ronald, Regnier, Stephane, Priest, Eric, Hood, A. W., Priest, E. R., S. Régnier, A. W. Hood, Regnier, S   +10 more
core   +1 more source

Research Progress on Solar Supergranulation: Observations, Theories, and Numerical Simulations

Universe
Solar supergranulation is a large-scale convective structure on the solar surface, whose formation mechanism and dynamical properties are closely related to key physical processes such as solar magnetic field evolution, coronal heating, and solar wind ...
Chong Huang, Rui Wang
doaj   +1 more source

The origin and dynamic interaction of solar magnetic fields [PDF]

, 2007
The dynamics of the solar corona are dominated by the magnetic field which creates its structure. The magnetic field in most of the corona is ‘frozen’ to the plasma very effectively.
Antonia Wilmot-Smith, Wilmot-Smith, Antonia, Wilmot-Smith, A.L.   +2 more
core  

Solar influences in the heliosphere: understanding coronal mass ejections and their associated magnetic clouds

, 2011
Coronal mass ejections (CMEs) are large-scale explosions on the Sun that expel plasma and magnetic field into the heliosphere. The interplanetary counterparts of CMEs, termed interplanetary CMEs (ICMEs), are often directly observed by spacecraft ...
Steed, K.
core  

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  

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
core  

Stealth Non-standard-model Confined Flare Eruptions: Sudden Reconnection Events in Ostensibly Inert Magnetic Arches from Sunspots

The Astrophysical Journal
We report seven examples of a long-ignored type of confined solar flare eruption that does not fit the standard model for confined flare eruptions. Because they are confined eruptions, do not fit the standard model, and unexpectedly erupt in ostensibly ...
Ronald L. Moore, Sanjiv K. Tiwari, Navdeep K. Panesar, V. Aparna, Alphonse C. Sterling   +4 more
doaj   +1 more source

Distribution of coronal heating in a solar active region

, 2008
Aims. We investigate the distribution of heating of coronal loops in a non-flaring solar active region, using a simple electrodynamic model: the random displacements of the loop footpoints, caused by photospheric plasma motions, generate electric ...
C. Gontikakis, I. Contopoulos, H. C. Dara   +2 more
core   +1 more source