Astronomy and Astrophysics – Astrophysics
Scientific paper
May 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agusmsp43b..04k&link_type=abstract
American Geophysical Union, Spring Meeting 2005, abstract #SP43B-04
Astronomy and Astrophysics
Astrophysics
7500 Solar Physics, Astrophysics, And Astronomy, 7522 Helioseismology, 7524 Magnetic Fields
Scientific paper
We use a ring-diagram analysis to determine the subsurface flows from high-resolution Global Oscillation Network Group (GONG) and Michelson Doppler Imager (MDI) data and derive the vorticity and the kinetic helicity of the subsurface flows in the upper 16~Mm of the convection zone. We separate the contributions of large-scale horizontal flows, such as differential rotation, from those of small-scale variations, such as the ones due to active regions, and analyze the large-scale and the residual component independently. We study the relation between magnetic activity and subsurface flows by comparing synoptic maps of the derived residual quantities with maps of photospheric magnetic activity. By comparing synoptic maps derived from GONG and MDI data, we are able to cross-validate the results. We will present the latest findings. This work has been supported by NASA and NSF.
González Hernández Irene
Haber Deborah A.
Hill F. F.
Howe Rachel
Komm Rudi
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