Computer Science – Sound
Scientific paper
May 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agusmsp51c..04k&link_type=abstract
American Geophysical Union, Spring Meeting 2005, abstract #SP51C-04
Computer Science
Sound
7514 Energetic Particles (2114), 7519 Flares, 7522 Helioseismology, 7524 Magnetic Fields, 7544 Stellar Interiors And Dynamo Theory
Scientific paper
MHD models of solar flares and CMEs suggest the magnetic energy for these events can be accumulated and released in magnetic structures sheared and twisted by plasma motions. We use time-distance helioseismology for investigating subphotospheric structures and dynamics of active regions that might be related to their flaring activity. In particular, we present a detailed study of active region NOAA 10486, which produced a series of X-class flares, during its passage on the solar disk for 8 days, Oct.25-Nov.1, 2003. The maps of subsurface flows and sound-speed perturbations are obtained from the SOHO/MDI data every 2-hours during this period, with 8-hour resolution and for the depth range of 0-12 Mm, and compared with the MDI magnetograms and X-ray data from RHESSI and GOES. The results reveal interesting dynamics at the depth of 4-6 Mm, which is compared with the restructuring, emergence and cancellation the magnetic field in this region.
Duvall Thomas L.
Kosovichev Aleksandr G.
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