Zonal Flows from the MDI Medium-l Data

Details Zonal Flows from the MDI Medium-l Data Zonal Flows from the MDI Medium-l Data

May 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...194.5612s&link_type=abstract

American Astronomical Society, 194th AAS Meeting, #56.12; Bulletin of the American Astronomical Society, Vol. 31, p.913

Astronomy and Astrophysics

Astronomy

Scientific paper

The small scale zonal flows in the outer part of the solar convection zone were recently detected by Kosovichev & Schou (1997) using f-mode frequency splittings. Results from five 72 day time-series (Schou et al. 1998) showed a slight drift of the pattern towards the equator in a manner similar to that seen in the so-called torsional oscillation observed using surface Doppler shift measurements. Here I describe results using several 72 day time-series of MDI Medium-l data. These results show a clear drift of the pattern towards the equator and that the near surface polar rotation rate appears to change with time. This research is supported by the SOI-MDI NASA grant NAG5-3077 at Stanford University.

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