TY - CHAP
T1 - Numerical simulations of rotating sunspots
AU - Botha, Gert
AU - Rucklidge, Alistair
AU - Busse, F. H.
AU - Hurlburt, Neal
N1 - Proceedings of SOHO-17 ‘10 Years of SOHO and Beyond’
http://www.esa.int/esapub/conference/toc/tocSP617.pdf
PY - 2006/7
Y1 - 2006/7
N2 - 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.
AB - 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.
UR - https://www.scopus.com/pages/publications/33749175736
M3 - Chapter
SN - 978-9290929284
VL - 617
T3 - ESA SP
BT - Proceedings of SOHO-17 ‘10 Years of SOHO and Beyond’
A2 - Lacoste, H.
PB - ESA Publications Division, ESTEC
CY - Noordwijk, The Netherlands
ER -