Magnetic Pinching of Hyperbolic Flux Tubes: I. Basic Estimations
| dc.creator | Titov, V. S. | |
| dc.creator | Galsgaard, K. | |
| dc.creator | Neukirch, T. | |
| dc.date | 2002-08-06 | |
| dc.date | 2002-10-04 | |
| dc.date.accessioned | 2026-07-07T07:53:33Z | |
| dc.date.available | 2026-07-07T07:53:33Z | |
| dc.description | The concept of hyperbolic flux tubes (HFTs) is a generalization of the concept of separator field lines for coronal magnetic fields with a trivial magnetic topology. An effective mechanism of a current layer formation in HFTs is proposed. This mechanism is called magnetic pinching and it is caused by large-scale shearing motions applied to the photospheric feet of HFTs in a way as if trying to twist the HFT. It is shown that in the middle of an HFT such motions produce a hyperbolic flow that causes an exponentially fast growth of the current density in a thin force-free current layer. The magnetic energy associated with the current layer that is built up over a few hours is sufficient for a large flare. Other implications of HFT pinching for solar flares are discussed as well. | |
| dc.description | 31 pages, 12 figures, accepted to Astrophysical Journal, added typos in Eq. (A9) and new comments to Sections 2 and 7, references updated | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0208112 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0208112 | |
| dc.identifier | Astrophys.J. 582 (2003) 1172-1189 | |
| dc.identifier | doi:10.1086/344799 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/126260 | |
| dc.subject | Astrophysics | |
| dc.title | Magnetic Pinching of Hyperbolic Flux Tubes: I. Basic Estimations | |
| dc.type | text |