Waves In Active Regions: Comparing Observations And 3D MHD Models

Details Waves In Active Regions: Comparing Observations And 3D MHD Models Waves In Active Regions: Comparing Observations And 3D MHD Models

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006spd....37.1802o&link_type=abstract

American Astronomical Society, SPD meeting #37, #18.02; Bulletin of the American Astronomical Society, Vol. 38, p.246

Astronomy and Astrophysics

Astronomy

Scientific paper

Recent TRACE observations of active regions in EUV shows waveactivity in coronal active regions following impulsive events.Motivated by these observations we construct 3D MHD models of theactive regions using photospheric magnetic field as boundarycondition from SOHO MDI or Kitt Peak data, and nonuniform densitystructure to model individual loops. We introduce several forms ofvelocity and density pulses to model the effects of impulsiveevents, such as flares, and follow the evolution of the modelactive region. We find good agreement between the observedevolution of active regions, and the 3D MHD models. Thus, wedemonstrate that the 3D MHD models can be used for coronalseismology. In the near future STEREO data may provide improvedinput for these models.

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