Solar Flows From Smalland Large Ring Analyses

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What is a small tile vs a large tile

High degree (ℓ > 300) acoustic waves are damped such that they do not circumnavigate the sun. Therefore, their frequencies are local measures of sun’s properties.

Local helioseismology uses these short wavelength acoustic waves measured on small patches of the solar surface.

tile < 4o small

tile = 15o standard

tile > 30o large

Small Tiles•flows associated with the genesis, evolution, and eruption of filaments

•flows beneath active regions correlated with flaring

•flows associated with supergranulation and giant cells

Science Possibilities

Science Possibilities

• With large tiles and new methods for taking care of the spherical nature of the waves, it may be possible to study the meridional flow, as well as anisotropies in the zonal flow, at the base of the convection zone.

Knowledge of these flows is important for understanding the solar dynamo.

Large Tiles

Dense-Pack flow fieldDense-Pack flow field

SUBSURFACE FLOWS FOR TWO SUCCESSIVE DAYSSUBSURFACE FLOWS FOR TWO SUCCESSIVE DAYS Magnetic Field Patterns Underlayed (Red-Green)Magnetic Field Patterns Underlayed (Red-Green)

Full Field Flows + H alpha

4o tiles

Flow cells lastingseveral days

30 Mar 2002 to 2 Apr 2002

Flows Near Filaments

4o tiles

Flow cells lastingseveral days

30 Mar 2002 to 2 Apr 2002

Flows Near Filaments

Flows averaged over 4 days and along the length of the filament

f modes p1 modes

AR 488 2003 Oct. 27

High resolution ring analyses

Zonal Flows – Global vs Local

30o tiles 15o tiles

Tasks to be Accomplished

• fit multiple ridges simultaneously • efficient tracking of many tiles • 3-d multiscale inversions • depth inversions with few modes • corrections for sphericity • magnetic field corrections • non-Lorentzian p-mode line profiles