Initial Results from SOI/MDI High Resolution Magnetograms

Session 69 - The Solar Dynamo and Helioseismology.
Display session, Thursday, June 13
Tripp Commons,

[69.15] Initial Results from SOI/MDI High Resolution Magnetograms

A. Title, T. Tarbell, Z. Frank, C. Schrijver, R. Shine, J. Wolfson, I. Zayer (Lockheed Martin Solar and Astrophysics Lab.), P. Scherrer, R. Bush, C. DeForest, T. Hoeksema (CSSA, Stanford U.)

The Michelson Doppler Imager (MDI) on SoHO takes magnetogram s with resolutions of 1.2 (high resolution) and 4 (full disk) arcseconds. Movies of 16 hour duration have been constructed in full disk and high resolution mode. High resolution movies of the south polar region also have been obtained. In sums of nine high resolution magnetograms it is possible to detect fields as low as 5 gauss and total fluxes as low as 5 10^16 Mx. In mid latitude regions new flux is observed to emerge everywhere. At all latitudes below 60 degrees flux is mixed on the scale of supergranulation. In the polar region above 60 degrees only fields of a single polarity are observed above the detection limit.

Program listing for Thursday