AAS 204th Meeting, June 2004
Session 53 Solar Interior
SPD Poster, Wednesday, June 2, 2004, 10:00am-7:00pm, Ballroom

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[53.09] Local Helioseismology of Solar Dynamics

D. C. Braun, C. Lindsey, A. C. Birch (NorthWest Res. Assoc., CoRA DIv.)

We have initiated a systematic exploration of the dynamics of the solar interior, applying Doppler-sensitive seismic holography to data from the MDI instrument onboard the SOHO spacecraft and the Global Oscillations Network Group (GONG). Goals of this comprehensive project include understanding the nature of supergranulation, monitoring the subsurface variations of the meridional circulation, and understanding other subsurface flows and their relation to solar activity. We present initial results on our inference of subsurface flows due with an emphasis on control work, including comparisons between MDI and GONG datasets and other local seismic procedures such as ring diagrams. The project will develop and test data analysis tools and a forward (and inverse) modeling formalism based on the Born approximation, in preparation for their routine application to the next generation of helioseismic data from the Helioseismic and Magnetic Imager (HMI) on the Solar Dynamics Observer. This work is supported by funding from NASA SR&T and Living With a Star programs and the NSF Stellar Astronomy and Astrophysics program.

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