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Session 53 - First Results from the Global Oscillations Network Group (GONG).
Oral session, Wednesday, June 12
Wisconsin Center,

[53.05] Solar Internal Rotation and Dynamics from GONG Frequency Splittings

M. J. Thompson (QMW, U. London), J. Toomre (JILA, U. Colorado), GONG Dynamics Inversion Team

The splitting of the Sun's global mode frequencies by large-scale flows can be used to investigate the rotation profile in both radius and latitude within the convection zone and deeper radiative interior. The inversion of GONG data confirms that the surface latitudinal variation of the rotation rate carries through much of the convection zone. At the base of the convection zone there is a currently unresolved adjustment layer with latitudinally independent rotation at greater depths. A shearing layer just below the surface is discernable at low to mid latitudes. Such global investigations are supplemented by local area analyses via ring diagrams, which enable us to probe the subsurface variation of rotation with depth beneath selected regions of the Sun.

Program listing for Wednesday