Artículo
3D MHD simulation of flare supra-arcade downflows in a turbulent current sheet medium
Fecha de publicación:
01/07/2015
Editorial:
IOP Publishing
Revista:
Astrophysical Journal
ISSN:
0004-637X
e-ISSN:
1538-4357
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Supra-arcade downflows (SADs) are sunward, generally dark, plasma density depletions originated above posteruption flare arcades. In this paper, using 3D MHD simulations we investigate whether the SAD cavities can be produced by a direct combination of the tearing mode and Kelvin-Helmholtz instabilities leading to a turbulent current sheet (CS) medium or if the current sheet is merely the background where SADs are produced, triggered by an impulsive deposition of energy. We find that to give an account of the observational dark lane structures an addition of local energy, provided by a reconnection event, is required. We suggest that there may be a closed relation between characteristic SAD sizes and CS widths that must be satisfied to obtain an observable SAD.
Palabras clave:
MAGNETOHYDRODYNAMICS (MHD)
,
SUN: CORONA
,
TURBULENCE
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Articulos(IATE)
Articulos de INST.DE ASTRONOMIA TEORICA Y EXPERIMENTAL
Articulos de INST.DE ASTRONOMIA TEORICA Y EXPERIMENTAL
Citación
Cécere, Mariana Andrea; Zurbriggen, Ernesto; Costa, Andrea; Schneiter, Ernesto Matías; 3D MHD simulation of flare supra-arcade downflows in a turbulent current sheet medium; IOP Publishing; Astrophysical Journal; 807; 1; 1-7-2015; 1-9
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