Magnetoseismological determination of magnetic field and plasma density height variation in a solar spicule

Verth, Gary, Goossens, Marcel and He, J. -S. (2011) Magnetoseismological determination of magnetic field and plasma density height variation in a solar spicule. The Astrophysical Journal, 733 (1). L15-L19. ISSN 0004-637X

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Official URL: http://dx.doi.org/10.1088/2041-8205/733/1/L15

Abstract

The variation of magnetic field strength and plasma density along a solar spicule is determined by the use of magnetoseismology. From Solar Optical Telescope observations of a kink wave propagating along a spicule, by estimating the spatial change in phase speed and velocity amplitude, a novel approach is demonstrated to determine the chromospheric height variation of both magnetic field and plasma density. Furthermore, the magnetoseismological estimate of the plasma density gradient is combined with electron density estimates from spectroscopy to determine the changing degree of ionization of hydrogen along a spicule.

Item Type: Article
Uncontrolled Keywords: magnetic fields, magnetohydrodynamics (MHD), plasmas, sun: oscillations
Subjects: F300 Physics
F500 Astronomy
Department: Faculties > Engineering and Environment > Mathematics and Information Sciences
Depositing User: Ay Okpokam
Date Deposited: 08 Feb 2012 15:44
Last Modified: 10 Aug 2015 11:20
URI: http://nrl.northumbria.ac.uk/id/eprint/5248

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