Results 111 to 120 of about 1,619,607 (208)

Measuring the Coronal Magnetic Field with 2D Coronal Seismology: A Forward-modeling Validation

The Astrophysical Journal Supplement Series
In recent years, a two-dimensional (2D) coronal seismology technique applied to spectral-imaging data from the Coronal Multi-channel Polarimeter (CoMP) and Upgraded Coronal Multi-channel Polarimeter (UCoMP) has enabled routine measurement of the global ...
Zihao Yang, Matthias Rempel, Sarah Gibson, Giuliana de Toma   +3 more
doaj   +1 more source

Propagating Kink Waves in Chromospheric Jetlike Structures and Coronal Plumelets

The Astrophysical Journal
Coronal plumes and chromospheric jetlike structures are believed to be highly dynamic. We report the first direct observations of a propagating kink wave in a chromospheric jetlike structure and its associated plumelet structure in the upper corona of ...
Youqian Qi, Mingzhe Guo, Zhenghua Huang, Tom Van Doorsselaere, Bo Li, Lidong Xia, Hengyuan Wei, Hui Fu   +7 more
doaj   +1 more source

Coronal Waves and Oscillations

Living Reviews in Solar Physics, 2005
Wave and oscillatory activity of the solar corona is confidently observed with modern imaging and spectral instruments in the visible light, EUV, X-ray and radio bands, and interpreted in terms of magnetohydrodynamic (MHD) wave theory.
Nakariakov Valery M., Verwichte Erwin
doaj  

Detection of Kink Oscillations in Solar Coronal Loops by a Convolutional Neural Network–Long Short-term Memory Neural Network

The Astrophysical Journal Supplement Series
A hybrid machine learning model, which combines a shallow convolutional neural network and a long short-term memory (CNN-LSTM) network, has been developed to automate the detection of kink oscillations in coronal plasma loops within large volumes of high-
Sergey A. Belov, Yu Zhong, Dmitrii Y. Kolotkov, Valery M. Nakariakov   +3 more
doaj   +1 more source

Relating near-Earth observations of an interplanetary coronal mass ejection to the conditions at its site of origin in the solar corona [PDF]

, 2005
A halo coronal mass ejection (CME) was detected on January 20, 2004. We use solar remote sensing data (SOHO, Culgoora) and near-Earth in situ data (Cluster) to identify the CME source event and show that it was a long duration flare in which a magnetic ...
Fazakerley, AN, Fazakerley, Andrew N., Culhane, J. Leonard, Mazelle, C., Balogh, A., Matthews, SA, van Driel-Gesztelyi, Lidia, Lucek, E., Reme, H, Owen, Chris J., Harra, LK, Harra, Louise K., Owen, CJ, Lucek, E, van Driel-Gesztelyi, L, Balogh, A, Culhane, JL, Matthews, Sarah A., Mazelle, C, Reme, H.   +19 more
core  

Signatures of Damping Nonlinear Oscillations by Kelvin–Helmholtz Instability–induced Turbulence in Synthetic Observations

The Astrophysical Journal
Large-amplitude decaying kink oscillations of coronal loops are strongly influenced by nonlinear processes such as Kelvin–Helmholtz instability (KHI) and turbulence, although comprehensive theoretical understanding and observational confirmation remain ...
Sihui Zhong, Andrew Hillier, Iñigo Arregui   +2 more
doaj   +1 more source

Nonlinearly Wave-Wave Interaction Leads to Solar Coronal Heating

Journal of Condensed Matter
Nonlinear formulation of slow Alfvén wave in magnetized plasma which can be an essential ingredient of the solar space plasma is being studied. Various method has been adopted, mathematical formulation of the magnetohydrodynamic (MHD) waves can interpret the astrophysical phenomena happening in space plasma.
openaire   +1 more source

Dynamics of Slow Solar Wind Emerging from an Equatorial Coronal Hole

The Astrophysical Journal
We present a three-dimensional reduced magnetohydrodynamics model to depict turbulence induced by Alfvén waves within the slow solar wind originating from an open magnetic field positioned in a coronal hole near the solar equator.
M. Asgari-Targhi, K. Fujiki
doaj   +1 more source

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

, 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  

Test for Alfven Wave Signatures in a Solar Coronal Hole

The Astrophysical Journal, 2003
Using spectral line observations to study minor ion motions in a solar coronal hole, a test was made for the presence of Alfven waves. From this we conclude that the Alfven wave flux into the upper portion of the hole is not significant. The SOHO/SUMER ultraviolet spectrograph was used to observe 22 coronal ions with masses ranging from 14mH to 56mH ...
openaire   +1 more source