Dynamo Modeling:What HMI/AIA can do for us(and perhaps vice versa)

Mark Miesch

HAO/NCAR, JILA/CU(Sacha Brun, Juri Toomre, Matt Browning, Marc DeRosa, Ben Brown)

Feb, 2006

Question 1:Are Flux-transport dynamos on the right track?

How can HMI help? Meridional Circulation measurements!

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Question 2:Where is the -effect?

How can HMI help? Estimates of flux emergence, diffusion, cancellation

Question 3:What maintains the Solar Rotation?

How can HMI help? Latudinal entropy/temperature variationsVelocity correlations (Reynolds stresses)

Question 4:Are magneto-shear instabilities operating in the tachocline?

How can HMI help? Non-axisymmetric patterns in flux emergence (esp. m=1)

Zonal jets

Question 5:What confines the tachocline?

How can HMI help? Tachocline oscillations, structure

Gough & McIntyre 1998 Brun & Zahn 2006

Question 6:What is the nature of giant cells?

How can HMI help? SSW, N/S downflow lanes, velocity/thermal/magnetic correlations

Question 7:How does flux organize, destabilize and emerge?

How can HMI help? Structure below active regions: how deep do they go?

Courtesy Y. Fan

Question 8:How does magnetic helicity flux through the photosphere effect

the dynamo?

How can HMI help? Estimates of helicity flux, patterns

Courtesy S. Gibson