[1.11] Studying Asphericity in the Solar Sound Speed from MDI and GONG Data 1995-1999

Solar Physics Division Meeting 2000, June 19-22
Session 1. Helioseismology, Magnetic Fields, Chromosphere and Transition Region
Display, Chair: C. U. Keller, Monday-Thursday, June 19, 2000, 8:00am-6:00pm, Forum Ballroom

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[1.11] Studying Asphericity in the Solar Sound Speed from MDI and GONG Data 1995-1999

J. Schou (Stanford), H.M. Antia (TIFR, Mumbai, India), S. Basu (Yale), R. Howe (NSO), F. Hill (NSO), R.W. Komm (NSO)

We study the variation of the frequency splitting coefficients describing the solar asphericity in both GONG and MDI data, and use these data to investigate temporal sound-speed variations as a function of both depth and latitude during the period 1995--99. We confirm that the sound-speed variations associated with the surface magnetic field are superficial.

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