Attributs | Valeurs |
---|
type
| |
Is Part Of
| |
Subject
| |
Title
| - Coronal heating and nanoflares: current sheet formation and heating
|
Date
| |
has manifestation of work
| |
related by
| |
Author
| |
Abstract
| - Aims. Solar photospheric footpoint motions can produce strong, localised currents in the corona. A detailed understanding of the formation process and the resulting heating is important in modelling nanoflares, as a mechanism for heating the solar corona. Methods. A 3D MHD simulation is described in which an initially straight magnetic field is sheared in two directions. Grid resolutions up to 512 3 were used and two boundary drivers were considered; one where the boundaries are continuously driven and one where the driving is switched off once a current layer is formed. Results. For both drivers a twisted current layer is formed. After a long time we see that, when the boundary driving has been switched off, the system relaxes towards a lower energy equilibrium. For the driver which continuously shears the magnetic field we see a repeating cycle of strong current structures forming, fragmenting and decreasing in magnitude and then building up again. Realistic coronal temperatures are obtained.
|
article type
| |
publisher identifier
| |
Date Copyrighted
| |
Rights
| |
Rights Holder
| |
is part of this journal
| |
is primary topic
of | |