Time-Distance Helioseismology of the Deep Interior T.L. Duvall Jr. (NASA/GSFC)

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Presentation transcript:

Time-Distance Helioseismology of the Deep Interior T.L. Duvall Jr. (NASA/GSFC)

Points to cover: Magnetic field measurements near convection zone bottom Deep flow measurements: surprise! : noise correlated from day to day Measuring travel times from convection simulations: how large a signal should there be?

Magnetic fields near the base of the convection zone

Rays for deep flow detection

Correlations of maps from one day to the next:

Looking at whether near-surface flows can cause day to day correlations Near-surface flows as shown by the f-mode divergence signal. Overlaid in green is the annulus used for detection of deep flows.

Travel times computed by taking a snapshot of a convection simulation and integrating over ray paths through the simulation to obtain the times.