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Shear-induced inflation of coronal magnetic fields
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Klimchuk, James A. |
| Copyright Year | 1989 |
| Description | Using numerical models of force-free magnetic fields, the shearing of footprints in arcade geometries leading to an inflation of the coronal magnetic field was examined. For each of the shear profiles considered, all of the field lines become elevated compared with the potential field. This includes cases where the shear is concentrated well away from the arcade axis, such that B(sub z), the component of field parallel to the axis, increases outward to produce an inward B(sub z)squared/8 pi magnetic pressure gradient force. These results contrast with an earlier claim, shown to be incorrect, that field lines can sometimes become depressed as a result of shear. It is conjectured that an inflation of the entire field will always result from the shearing of simple arcade configurations. These results have implications for prominence formation, the interplanetary magnetic flux, and possibly also coronal holes. |
| File Size | 1230437 |
| Page Count | 52 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19900004862 |
| Archival Resource Key | ark:/13960/t6rz45j34 |
| Language | English |
| Publisher Date | 1989-08-05 |
| Access Restriction | Open |
| Subject Keyword | Solar Physics Magnetic Flux Solar Corona Potential Fields Coronal Holes Force-free Magnetic Fields Footprints Mathematical Models Solar Magnetic Field Shearing Pressure Gradients Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
