Results 31 to 40 of about 232,020 (293)
The Equilibrium of Coronal Loops Near Separatrices
The Astrophysical Journal, 2023 We present numerical models from the field-aligned HYDrodynamics and RADiation code (HYDRAD) of a highly asymmetric closed coronal loop with near-singular expansion factor.
Emily I Mason +2 more
doaj +1 more source
Determination of the coronal magnetic field by coronal loop oscillations [PDF]
Astronomy & Astrophysics, 2001 We develop a new method for the determination of the absolute value of the magnetic field strength in coronal closed magnetic structures, based on the analysis of flare-generated oscillations of coronal loops. Interpretation of the oscillations observed in terms of global standing kink waves allows to connect the period of the oscillations and the ...
Nakariakov, V. M. (Valery M.) +1 more
openaire +2 more sources
3-D numerical simulations of coronal loops oscillations [PDF]
Annales Geophysicae, 2009 We present numerical results of 3-D MHD model of a dipole active region field containing a loop with a higher density than its surroundings. We study different ways of excitation of vertical kink oscillations by velocity perturbation: as an initial ...
M. Selwa +4 more
doaj +1 more source
Fleeting Small-scale Surface Magnetic Fields Build the Quiet-Sun Corona
The Astrophysical Journal Letters, 2023 Arch-like loop structures filled with million Kelvin hot plasma form the building blocks of the quiet-Sun corona. Both high-resolution observations and magnetoconvection simulations show the ubiquitous presence of magnetic fields on the solar surface on ...
L. P. Chitta +21 more
doaj +1 more source
Coronal Seismology and the Propagation of Acoustic Waves along Coronal Loops [PDF]
The Astrophysical Journal, 2004 We use a combination of analytical theory, numerical simulation, and data analysis to study the propagation of acoustic waves along coronal loops. We show that the intensity perturbation of a wave depends on a number of factors, including dissipation of the wave energy, pressure and temperature gradients in the loop atmosphere, work action between the ...
Klimchuk, J. A. +2 more
openaire +2 more sources
CDS wide slit time-series of EUV coronal bright points [PDF]
, 2004 Wide slit (90" x 240" ) movies of four Extreme Ultraviolet coronal bright points (BPs) obtained with the Coronal Diagnostic Spectrometer (CDS) on board the Solar and Heliospheric Observatory (SoHO) have been inspected.
V. M. Nakariakov +7 more
core +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
Coronal Heating from Alfvén Wave Turbulence in Solar Coronal Loops
, 2020 Many scientific theories have been proposed in the hopes of better understanding the coronal heating problem. This project largely focuses on the theory that the Solar Corona is heated by Alfvén Wave turbulence from solar coronal loops.
Hamann, Sydney
core +1 more source
Observations of the Formation and Disappearance of a Funnel Prominence
The Astrophysical Journal LettersWe present an observational study of the formation and disappearance of a funnel prominence. Before the funnel prominence formed, cool materials from the top of a preexisting polar crown prominence flowed along saddle-shaped coronal loops to their base ...
Bo Yang +3 more
doaj +1 more source
Transverse Oscillations of Two Coronal Loops [PDF]
The Astrophysical Journal, 2008 Accepted for publication in The Astrophysical ...
Luna, M. +3 more
openaire +2 more sources