R. Komm

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Solar Subsurface Flowsfrom Ring-Diagram Analysis

• R. Komm Friends
• NSO, Tucson

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Overview

• Recent Progress in Ring Analysis
• Physical Parameters
• Connections to Magnetic Activity
• Utilize HMI Subsurface Flow Maps
• Future Efforts

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What will HMI provide?

• High Spatial Resolution
• better fits
• closer to limb
• Continuous Coverage
• better statistics / catch every active region
• collaboration / campaigns (AIA, SHINE)

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SHINE Events
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Recent progress in Ring Analysis

• Standard Dense-Pack Analysis
• Small Rings (Haber, Hindman)
• Big Rings (González Hernández)
• Others such as non-tracking (Basu, Bogart)

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Dense-Pack Ring Diagram Analysis
16o patch, circular apodized to15o 1664 min (1
ring day) 0 - 16 Mm depth
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Synoptic Maps of (vx, vy) and vz
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Synoptic Maps of Vorticity
? ? v
AR 0069 300o Longitude, -7.5o Latitude
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Vorticity vs. Flare Intensity
Mason et al.
?s a ( b c Bmax) ( logF.I
logd )
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Flares and Flows Temporal Variation
AR 0696
Vertical Velocity Enstrophy
Kinetic Helicity Density
GOES data http//www.ngdc.noaa.gov/stp
/SOLAR/ftpsolarflares.htmlxray
AR 10696 2004, Nov 2 - 9
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Physical Parameters

• Horizontal Flows (measured)
• Vertical Flows (divergence)
• Vorticity (curl v)
• Kinetic Helicity Density (v
  curl v)

Kinetic Helicity Density
Indicators of magnetic activity twist of flux
tubes?
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Zonal flow and north-south asymmetry
0.6 Mm (solid) 1.7 Mm (dotted) 5.8 Mm
(dashed) 11.6 Mm dot-dashed)
north (crosses) south (squares)
Zaatri
Corrected for annual variations
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High-Resolution Flow and Ha
29 Mar 2002
BBSO Ha
MDI f modes depth 2Mm
Haber, Hindman
Improved Resolution with Small Rings (4o tiles)
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Flows near Filaments
30 Mar 2002 to 2 April 2002
Flow cells lasting several days
Haber, Hindman
Flows are complicated and changing.
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Rotation Rate from Big Rings
15o patches
Big Rings 30o patches
González Hernández
Good match with global rate below 0.97 R
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Meridional Flow from Big Rings
0.985 r/R 0.970 r/R 0.960 r/R
0.995 r/R 0.975 r/R 0.965 r/R
González Hernández
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Multiple-Tile-Size Analysis for HMI

• Dense Pack
• daily and synoptic maps done quickly
• Small Rings
• 1o resolution with HMI (MDI 2o and 4o)
• selected magnetic features supergranules
• Big Rings
• deep large-scale flows unbiased by surface

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Utilize HMI Subsurface Flow Maps

• Weather Maps (routine product)
• Active Region Development
• Basic Research
• Prediction?
• Localization of Events
• Large-scale flows in upper cz (gt0.9 R)

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Future Efforts

• Standardize Big and Small Rings
• Fitting / Inversions need work
• Experiment with spatial temporal scales
• Connect Flow Parameters with Activity
• How reliable are daily variations?

? Problems are technique issues. ? Code
development?