The Library
The emergence of magnetic flux through a partially ionised solar atmosphere
Tools
Tools
Tools
Leake, J. E. (James E.) and Arber, T. D. (2006) The emergence of magnetic flux through a partially ionised solar atmosphere. Astronomy & Astrophysics, Vol.450 (No.2). pp. 805-818. doi:10.1051/0004-6361:20054099 ISSN 0004-6361.
![[img]](https://wrap.warwick.ac.uk/style/images/fileicons/application_pdf.png) |
PDF
WRAP_Leake_78_Emergence_Magnetic.pdf - Requires a PDF viewer. Download (390Kb) |
Official URL: http://dx.doi.org/10.1051/0004-6361:20054099
Abstract
We present results from 2.5D numerical simulations of the emergence of magnetic flux from the upper convection zone through the photosphere and chromosphere into the corona. Certain regions of the solar atmosphere are at sufficiently low temperatures to be only partially ionised, in particular the lower chromosphere. This leads to Cowling resistivities orders of magnitude larger than the Coulomb values, and thus to anisotropic dissipation in Ohm’s law. This also leads to localised low magnetic Reynolds numbers (R m < 1). We find that the rates of emergence of magnetic field are greatly increased by the partially ionised regions of the model atmosphere, and the resultant magnetic field is more diffuse. More importantly, the only currents associated with the magnetic field to emerge into the corona are aligned with the field, and thus the newly formed coronal field is force-free.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QB Astronomy | ||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
| Library of Congress Subject Headings (LCSH): | Sun -- Corona -- Magnetic fields -- Mathematical models, Magnetohydrodynamics | ||||
| Journal or Publication Title: | Astronomy & Astrophysics | ||||
| Publisher: | EDP Sciences | ||||
| ISSN: | 0004-6361 | ||||
| Official Date: | May 2006 | ||||
| Dates: |
|
||||
| Volume: | Vol.450 | ||||
| Number: | No.2 | ||||
| Page Range: | pp. 805-818 | ||||
| DOI: | 10.1051/0004-6361:20054099 | ||||
| Status: | Peer Reviewed | ||||
| Access rights to Published version: | Open Access (Creative Commons) | ||||
| Funder: | Particle Physics and Astronomy Research Council (Great Britain) (PPARC) | ||||
| Grant number: | PPA/S/S/2003/03728 (PPARC) |
Request changes or add full text files to a record
Repository staff actions (login required)
 |
View Item |
Downloads
Downloads per month over past year
