Results 51 to 60 of about 43,284 (218)

On the Nature of the Three-part Structure of Solar Coronal Mass Ejections

The Astrophysical Journal, 2022
Coronal mass ejections (CMEs) result from eruptions of magnetic flux ropes (MFRs) and can possess a three-part structure in white-light coronagraphs, including a bright front, dark cavity, and bright core.
Hongqiang Song, Jie Zhang, Leping Li, Zihao Yang, Lidong Xia, Ruisheng Zheng, Yao Chen   +6 more
doaj   +1 more source

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, Spiro K Antiochos, Stephen Bradshaw   +2 more
doaj   +1 more source

Dynamics of solar coronal loops [PDF]

Astronomy & Astrophysics, 2004
13 pages, 15 ...
Müller, Daniel, Peter, Hardi, Hansteen, Viggo H.   +2 more
openaire   +3 more sources

Comparison of Two Coronal Magnetic Field Models to Reconstruct a Sigmoidal Solar Active Region with Coronal Loops [PDF]

, 2017
Magnetic field extrapolation is an important tool to study the three-dimensional (3D) solar coronal magnetic field, which is difficult to directly measure.
A. Duan, A. Duan, Chaowei Jiang, Q. Hu, Huai Zhang, G. A. Gary, S. Wu, Jinbin Cao   +7 more
semanticscholar   +1 more source

Numerical simulations of vertical oscillations of a solar coronal loop [PDF]

Astronomy & Astrophysics, 2005
We consider the impulsive excitation of fast vertical kink standing waves in a solar coronal loop that is embedded in a potential arcade. The two-dimensional numerical model we implement includes the effects of field line curvature and nonlinearity on the excitation and damping of standing fast magnetosonic waves.
Selwa, M., Murawski, K., Solanki, S., Wang, T., Tóth, G.   +4 more
openaire   +3 more sources

Coronal Loops with Different Metallicities and Generalized RTV Scaling Laws

The Astrophysical Journal, 2023
Stellar metallicity is a critical factor to characterize the stellar coronae because it directly affects the radiative energy loss from the atmosphere.
Haruka Washinoue, Takeru K. Suzuki
doaj   +1 more source

Evidence of nonthermal particles in coronal loops heated impulsively by nanoflares [PDF]

Science, 2014
The physical processes causing energy exchange between the Sun’s hot corona and its cool lower atmosphere remain poorly understood. The chromosphere and transition region (TR) form an interface region between the surface and the corona that is highly ...
P. Testa, B. Pontieu, J. Allred, M. Carlsson, Fabio Reale, Adrian Daw, V. Hansteen, J. Martínez-Sykora, W. Liu, Edward E. DeLuca, L. Golub, S. McKillop, K. Reeves, S. Saar, H. Tian, J. Lemen, A. Title, P. Boerner, N. Hurlburt, T. Tarbell, J. Wuelser, L. Kleint, C. Kankelborg, Sarah Jaeggli Harvard-Smithsonian Center for Astrophysics, Cambridge, Usa Lockheed Martin Solar, Astrophysics Laboratory, P. Alto, Usa Institute of Astrophysics, U. Oslo, Oslo, Norway Nasa Goddard Space Flight Center, Greenbelt, Usa Dipartimento di Fisica, Chimica, U. Palermo, Istituto Nazionale di Astrofisica - Osservatorio Astronomic Palermo, 1. PiazzadelParlamento, Palermo, Italy Bay Area Environmental Research, Sonoma, USA. W. W. Hansen Experimental Physics Laboratory, Stanford University, Stanford, U. physics, Montana State University, Bozeman, Usa   +47 more
semanticscholar   +1 more source

Structure of solar coronal loops: from miniature to large-scale [PDF]

, 2013
Aims. We use new data from the High-resolution Coronal Imager (Hi-C) with its unprecedented spatial resolution of the solar corona to investigate the structure of coronal loops down to 0.2 (cid:48)(cid:48) . Methods.
H. Peter, S. Bingert, J. Klimchuk, C. D. Forest, J. Cirtain, L. Golub, A. Winebarger, Ken Kobayashi, K. Korreck   +8 more
semanticscholar   +1 more source

Are Nonthermal Velocities in Active Region Coronal Loops Anisotropic?

The Astrophysical Journal, 2023
We have measured line widths in active region coronal loops in order to determine whether the nonthermal broadening is anisotropic with respect to the magnetic field direction. These nonthermal velocities are caused by unresolved fluid motions.
Michael Hahn, Mahboubeh Asgari-Targhi, Daniel Wolf Savin   +2 more
doaj   +1 more source

Diagnostics of the solar coronal plasmas by magnetohydrodynamic waves: magnetohydrodynamic seismology [PDF]

Reviews of Modern Plasma Physics
Macroscopic wave and oscillatory phenomena ubiquitously detected in the plasma of the corona of the Sun are interpreted in terms of magnetohydrodynamic theory. Fast and slow magnetoacoustic waves are clearly distinguished in observations.
V. Nakariakov, S. Zhong, D. Kolotkov, R. L. Meadowcroft, Y. Zhong, Ding Yuan   +5 more
semanticscholar   +1 more source