Results 31 to 40 of about 11,368 (206)

Coronal global EIT waves as tools for multiple diagnostics [PDF]

open access: yes, 2007
Observations in EUV lines of the solar corona revealed large scale propagating waves generated by eruptive events able to travel across the solar disk for large distances. In the low corona, CMEs are known to generate, e.g. EIT waves which can be used to
I. Ballai, M. Douglas, Nowak
core   +1 more source

Dual-Species Plasmas Illustrate MHD Flows [PDF]

open access: yes, 2008
Plasma loops created in the laboratory strongly resemble structures observed in the solar corona. For example, both solar coronal loops and experimental loops exhibit remarkably uniform axial cross sections. A magnetohydrodynamic theory that was proposed
Bellan, Paul M., Stenson, Eve V.
core   +1 more source

Coronal Loops with Different Metallicities and Generalized RTV Scaling Laws

open access: yesThe 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

Solar Coronal Loops Associated with Small-scale Mixed Polarity Surface Magnetic Fields

open access: yes, 2017
How and where are coronal loops rooted in the solar lower atmosphere? The details of the magnetic environment and its evolution at the footpoints of coronal loops are crucial to understanding the processes of mass and energy supply to the solar corona ...
Barthol, P.   +14 more
core   +1 more source

Dynamics of solar coronal loops [PDF]

open access: yesAstronomy & Astrophysics, 2004
13 pages, 15 ...
Müller, Daniel   +2 more
openaire   +3 more sources

New analytical and numerical models of solar coronal loop: I. Application to forced vertical kink oscillations

open access: yes, 2014
Aims. We construct a new analytical model of a solar coronal loop that is embedded in a gravitationally stratified and magnetically confined atmosphere. On the basis of this analytical model, we devise a numerical model of solar coronal loops.
Kraskiewicz, J.   +3 more
core   +1 more source

EUV FLICKERING OF SOLAR CORONAL LOOPS: A NEW DIAGNOSTIC OF CORONAL HEATING [PDF]

open access: yesThe Astrophysical Journal Letters, 2016
ABSTRACT A previous work of ours found the best agreement between EUV light curves observed in an active region core (with evidence of super-hot plasma) and those predicted from a model with a random combination of many pulse-heated strands with a power-law energy distribution.
E. Tajfirouze   +3 more
openaire   +2 more sources

Standing Kink Waves in Sigmoid Solar Coronal Loops: Implications for Coronal Seismology [PDF]

open access: yesThe Astrophysical Journal Letters, 2020
Abstract Using full three-dimensional magnetohydrodynamic numerical simulations, we study the effects of magnetic field sigmoidity or helicity on the properties of the fundamental kink oscillation of solar coronal loops. Our model consists of a single denser coronal loop, embedded in a plasma with dipolar force-free magnetic field with a
N. Magyar, V. M. Nakariakov
openaire   +2 more sources

Are Nonthermal Velocities in Active Region Coronal Loops Anisotropic?

open access: yesThe 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   +2 more
doaj   +1 more source

On active region loops: Hinode/EIS observations

open access: yes, 2008
Coronal loops are fundamental building blocks of the solar active regions and the corona. Therefore, a clear understanding of the physics of coronal loops will help us understand the physics of active region heating in particular and coronal heating in ...
Antolin   +29 more
core   +1 more source

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