Solar Flares, Magnetic Fields, And Subsurface Vorticity. A Survey Of Gong And Mdi Data

Details Solar Flares, Magnetic Fields, And Subsurface Vorticity. A Survey Of Gong And Mdi Data Solar Flares, Magnetic Fields, And Subsurface Vorticity. A Survey Of Gong And Mdi Data

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006spd....37.0506m&link_type=abstract

American Astronomical Society, SPD meeting #37, #5.06; Bulletin of the American Astronomical Society, Vol. 38, p.224

Astronomy and Astrophysics

Astronomy

Scientific paper

We search for a relation between flare events and magnetic fields in active regions and the subsurface flows associated with these regions. For this purpose, we determine the solar subsurface flows from high-resolution Global Oscillation Network Group (GONG) and and Michelson Doppler Imager (MDI) Dynamics Program data using ring-diagram analysis (a local helioseismology technique). For the first time, we have been able to search out these connections with a statistical analysis of consecutive data that encompass many years. We have found that the vorticity of the flow field below the solar surface, specifically the maximum flow vorticity within each active region, correlates well with the total X-ray flare intensity data for the region (provided by GOES, the Geostationary Operation Environmental Satellite). Above a certain threshold of flare activity, vorticity values exhibit a linear relationship with total flare activity that is dependent on the magnetic flux of the active region.This work is carried out through the National Solar Observatory Research Experiences for Undergraduate (REU) site program, which is co-funded by the Department of Defense in partnership with the National Science Foundation REU Program.

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