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Session 37 - First Results from the Solar and Heliospheric Observatory (SOHO).
Display session, Tuesday, June 11
Tripp Commons,

[37.11] Solar Oscillation Observations with the MDI Line Depth Parameter

C. J. Henney, R. K. Ulrich (UCLA), R. S. Bogart, L. A. D. Sá (CSSA), D. A. Haber (JILA), F. Hill (NSO)

The line-depth parameter determined by the Michelson Doppler Imager (MDI) on the Solar Heliospheric Observatory (SOHO) provides a measure of magnetic field structures on the Sun. This parameter, along with the MDI continuum parameter, will be used to estimate the change in the solar brightness, due to active region effects, at the NaD working points of the Global Oscillation Low Frequency (GOLF) instrument on SOHO to allow correction of the GOLF signal. Preliminary comparison of simultaneous full-disk observations of line-depth and Doppler images show a weak correlation. We investigate the possible causes for this correlation. In addition, we use ring-diagram analysis of high-resolution observations, taken using the MDI line-depth parameter on March 7, 1996, to study large-scale flows beneath the heliographic south pole.

Program listing for Tuesday