The Structure and Evolution of Solar Active Regions
P.I.: T.M. Brown (HAO/NCAR)
Co-Is: T.J. Bogdan (HAO/NCAR), A. Skumanich (HAO/NCAR)
This study aims to combine seismic and polarimetric observations to deduce
the time-dependent structure of solar active regions, both above and below
the photospheric level.
New analysis methods (including time-distance analysis, p-mode
absorption and scattering measurements, and characterization of
acoustic sources) will be applied to MDI helioseismology data
to infer subsurface flows and magnetic field structures in the general
neighborhood of selected magnetic active regions.
These regions will also be observed at high spatial resolution
with the Advanced Stokes Polarimeter, yielding both vector magnetic field
maps and moderate-resolution Doppler time series that may be used for
further seismic analysis.
These various observations will be combined in an attempt to clarify the
relations between flows, electric currents, and field patterns in and around
centers of magnetic activity.
Complete text of proposal.