Helioseismic Inversions applied to a Realistic MHD Sunspot Simulation

Details Helioseismic Inversions applied to a Realistic MHD Sunspot Simulation Helioseismic Inversions applied to a Realistic MHD Sunspot Simulation

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009spd....40.0713b&link_type=abstract

American Astronomical Society, SPD meeting #40, #7.13; Bulletin of the American Astronomical Society, Vol. 41, p.814

Computer Science

Sound

Scientific paper

Local helioseismology applied to the realistic magneto-convection sunspot simulations of Rempel et al. produces solar-like wave travel times. We apply standard ray-theory based inversions to infer subsurface wave speed from these travel times. We find that the inferred wave-speed perturbations are similar to the wave-speed perturbations found from the analysis of typical sunspots observed with MDI. We show, however, that the ray theory inversions fail to retrieve the true time-averaged sound speed or fast-mode speed from the simulations. We propose some alternative strategies for inferring the subsurface structure of sunspots.
This work is supported by NASA contracts NNH09CE41C and NNG07EI51C.

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