Botha, Gert, Rucklidge, Alistair, Busse, F. H. and Hurlburt, Neal (2006) Numerical simulations of rotating sunspots. In: Proceedings of SOHO-17 ‘10 Years of SOHO and Beyond’. ESA SP, 617 . ESA Publications Division, ESTEC, Noordwijk, The Netherlands. ISBN 978-9290929284
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Abstract
A numerical model of idealized, axisymmetric, rotating sunspots is presented. The model contains a compressible plasma described by the nonlinear MHD equations, with density and temperature gradients simulating the upper layer of the sun’s convection zone. The solution forms a central flux tube in the cylindrical numerical domain, with convection cells pushing the magnetic field to the axis. When the numerical domain is rotated with a constant angular velocity, the umbra rotates as a rigid body while the surrounding convection cells show a swirling, vortical flow. As a result, the azimuthal velocity and magnetic field have their maximum values close to the flux tube, inside the innermost convection cell.
| Item Type: | Book Section |
|---|---|
| Additional Information: | Proceedings of SOHO-17 ‘10 Years of SOHO and Beyond’ http://www.esa.int/esapub/conference/toc/tocSP617.pdf |
| Subjects: | F500 Astronomy G900 Others in Mathematical and Computing Sciences |
| Department: | Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering |
| Depositing User: | Dr Gert Botha |
| Date Deposited: | 14 Jan 2013 10:05 |
| Last Modified: | 17 Dec 2023 14:03 |
| URI: | https://nrl.northumbria.ac.uk/id/eprint/10995 |
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