MHD waves generated by high-frequency photospheric vortex motions

Fedun, Viktor, Shelyag, Sergiy, Verth, Gary, Mathioudakis, Mihalis and Erdélyi, Robert (2011) MHD waves generated by high-frequency photospheric vortex motions. Annales Geophysicae, 29 (6). pp. 1029-1035. ISSN 1432-0576

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Abstract

In this paper, we discuss simulations of MHD wave generation and propagation through a three-dimensional open magnetic flux tube in the lower solar atmosphere. By using self-similar analytical solutions for modelling the magnetic field in Cartesian coordinate system, we have constructed a 3-D magnetohydrostatic configuration which is used as the initial condition for non-linear MHD wave simulations. For a driver we have implemented a high-frequency vortex-type motion at the footpoint region of the open magnetic flux tube. It is found that the implemented swirly source is able to excite different types of wave modes, i.e. sausage, kink and torsional Alfvén modes. Analysing these waves by magneto-seismology tools could provide insight into the magnetic structure of the lower solar atmosphere.

Item Type:	Article
Uncontrolled Keywords:	solar physics, astrophysics, astronomy(photosphere and chromosphere)
Subjects:	G100 Mathematics
Department:	Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User:	Ay Okpokam
Date Deposited:	08 Feb 2012 15:45
Last Modified:	13 Oct 2019 00:31
URI:	http://nrl.northumbria.ac.uk/id/eprint/5247

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