34th Solar Physics Division Meeting, June 2003
Session 8 Helioseismology
Poster, Monday, June 16, 2003, 3:30-5:00pm, Mezzanine

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[8.12] Differences in the sound-speed profiles of active and quiet regions

S. Basu (Yale University), R.S. Bogart (Stanford University)

We determine differences in the sound-speed profiles of isolated active regions and nearby quiet areas. We use frequencies of high-degree modes determined from from ring-diagram analyses for this work. We that below a certain depth, the sound-speed below an active region is higher than that of a quiet region.

This work is supported by NASA grant NAG5-10912.

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Bulletin of the American Astronomical Society, 35 #3
© 2003. The American Astronomical Soceity.