Helioseismology of a Realistic MHD Sunspot Simulation

Details Helioseismology of a Realistic MHD Sunspot Simulation Helioseismology of a Realistic MHD Sunspot Simulation

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009spd....40.0303b&link_type=abstract

American Astronomical Society, SPD meeting #40, #3.03; Bulletin of the American Astronomical Society, Vol. 41, p.810

Physics

Scientific paper

We have recently measured travel times and absorption of p modes propagating through a realistic numerical model of solar convection in the presence of a sunspot-like structure. Both the mean travel-time perturbations and the absorption in the simulation are remarkably similar to those observed in typical sunspots. Therefore, simulations of this type provide both the means to understand the physics behind the helioseismic observations and the opportunity to validate existing and future models of the subsurface structure of sunspots. We will compare helioseismic measurements made with the simulation with those of a typical sunspot observed with MDI. We will discuss the implications of these comparisons for structural inversions of sunspots and understanding the role of MHD mode conversion in interpreting helioseismic observations. This work is supported by NASA contracts NNH09CE41C and NNG07EI51C.

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