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Transverse oscillations and stability of prominences in a magnetic field dip

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Kolotkov, Dmitrii, Nisticò, Giuseppe and Nakariakov, V. M. (2016) Transverse oscillations and stability of prominences in a magnetic field dip. Astronomy & Astrophysics, 590 . A120. doi:10.1051/0004-6361/201628501

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Official URL: http://dx.doi.org/10.1051/0004-6361/201628501

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Abstract

Aims. An analytical model of the global transverse oscillations and mechanical stability of a quiescent prominence in the magnetised environment with a magnetic field dip, accounting for the mirror current effect, is developed. Methods. The model is based upon the interaction of line currents through the Lorentz force. Within this concept the prominence is treated as a straight current-carrying wire, and the magnetic dip is provided by two photospheric current sources. Results. Properties of both vertical and horizontal oscillations are determined by the value of the prominence current, its density and height above the photosphere, and the parameters of the magnetic dip. The prominence can be stable in both horizontal and vertical directions simultaneously when the prominence current dominates in the system and its height is less than the half-distance between the photospheric sources.

Item Type: Journal Article
Subjects: Q Science > QB Astronomy
Divisions: Faculty of Science > Physics
Library of Congress Subject Headings (LCSH): Sun -- Filaments, Solar magnetic fields, Sun -- Corona
Journal or Publication Title: Astronomy & Astrophysics
Publisher: EDP Sciences
ISSN: 0004-6361
Official Date: 25 May 2016
Dates:
DateEvent
25 May 2016Available
13 April 2016Accepted
Volume: 590
Article Number: A120
DOI: 10.1051/0004-6361/201628501
Status: Peer Reviewed
Publication Status: Published
Funder: European Research Council (ERC), Science and Technology Facilities Council (Great Britain) (STFC), Korea (South). Kyoyuk Kwahak Kisulbu [Ministry of Education, Science and Technology] (MEST)
Grant number: Project No. 321141 SeismoSun (ERC), ST/L000733/1 (STFC), BK21 (MEST)

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