Extreme ultraviolet emission lines of Ni xii in laboratory and solar spectra

Botha, Gert and Evangelidis, E. A. (2004) Extreme ultraviolet emission lines of Ni xii in laboratory and solar spectra. Monthly Notices of the Royal Astronomical Society, 350 (1). pp. 375-384. ISSN 0035-8711

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Official URL: http://dx.doi.org/10.1111/j.1365-2966.2004.07658.x


A linear force-free field solution is presented in cylindrical coordinates, formulated in terms of trigonometric and Bessel functions. A numerical exploration has revealed that this solution describes magnetic field lines that meander in Cartesian space, as well as field lines that lie on toroidal flux surfaces. These tori are in (or close to) the plane perpendicular to the cylindrical axis. Nested tori, as well as tori with shells that have finite thickness, were found. The parameter space of the solution shows that the tori exist within a bounded range of values.

Item Type: Article
Subjects: F300 Physics
F500 Astronomy
G100 Mathematics
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Dr Gert Botha
Date Deposited: 16 Jan 2013 10:02
Last Modified: 17 Dec 2023 14:05
URI: https://nrl.northumbria.ac.uk/id/eprint/11008

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