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.

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 -