Poster abstract details

In order to correctly interpret the observed cross-covariance of the helioseismic wavefield in the vicinity of a sunspot, it is necessary to accurately model the effect of the sunspot structure and magnetic field on the waves. Using a combination of quiet-Sun and semi-empirical models of the umbra and penumbra, we have constructed sunspot models which have helioseismic signatures that are similar to the SOHO/MDI observations, as demonstrated by 3D MHD numerical simulations of wave propagation. We also compare the helioseismic signature of two sunspot models which have identical surface properties but have different subsurface structures.