Meridional Flows from Ring Diagram Analysis

Details Meridional Flows from Ring Diagram Analysis Meridional Flows from Ring Diagram Analysis

Jan 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999apj...510l.153g&link_type=abstract

The Astrophysical Journal, Volume 510, Issue 2, pp. L153-L156.

Astronomy and Astrophysics

Astronomy

28

Convection, Sun: Oscillations

Scientific paper

In order to search for meridional circulation in the solar envelope, we have applied ring diagram analysis to a set of small regions over the surface. The helioseismic data consist of Solar Oscillation Investigation/Michelson Doppler Imager Dopplergrams taken over a time span of about 50 hr (~3000 images) on 1998 June 20-22. The regions studied cover 115 deg in latitude centered on the equator and 30 deg in longitude. We find poleward flows between r/ R_solar=0.97 and the surface. There is no evidence in this depth range for the return path of these meridional flows. The temporal stability of these flows will be discussed after the analysis of a synoptic map obtained using the same technique.

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