AAS 200th meeting, Albuquerque, NM, June 2002
Session 89. Solar Internal Structure and Dynamics
Oral, Thursday, June 6, 2002, 2:00-3:30pm, Mesilla

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[89.03] Helioseismic observations of developing active regions in the solar convection zone

A. Kosovichev (Stanford University), T. Duvall, Jr. (NASA/GSFC)

Time-distance helioseismology provides unique opportunities for studying the formation and evolution of regions of solar activity. The key questions are: How deep in the convection zone are the active regions formed? How fast do they erupt? What is the role of convective mass flows in the formation and evolution of active regions? Is there retraction of magnetic flux during the decay of active regions? Why do new active regions tend to appear in places where previous active regions existed? We discuss the current techniques for probing the subphotospheric structure and dynamics of active regions, uncertainties and limitations of these studies, and present results of observation of three developing active regions using Michelson Doppler Imager on SOHO.

The author(s) of this abstract have provided an email address for comments about the abstract: sasha@quake.stanford.edu

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Bulletin of the American Astronomical Society, 34
© 2002. The American Astronomical Soceity.