Subsurface Vorticity of Emerging Active Regions

Details Subsurface Vorticity of Emerging Active Regions Subsurface Vorticity of Emerging Active Regions

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011spd....42.1601k&link_type=abstract

American Astronomical Society, SPD meeting #42, #16.01; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

We study the temporal variation of subsurface flows associated with emerging active regions. We have analyzed the flows of nearly 1000 active and quiet regions analyzing GONG high-resolution Doppler data with ring-diagram analysis. We determine the change in unsigned magnetic flux during the disk passage of each active region using MDI magnetograms binned to the ring-diagram grid. In a previous study, we have found that emerging flux has a faster rotation than the ambient fluid and pushes it up, as indicated by enhanced vertical velocity and faster-than-average zonal flow. In this study, we are focusing on the vorticity of subsurface flows associated with newly emerging active regions. We will present the latest results.

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