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Two HMI Seismic Goals: One Local and One Global

Two HMI Seismic Goals: One Local and One Global. Philip R. Goode Big Bear Solar Observatory New Jersey Institute of Technology. HMI Seismic Goals. Understand origin of frequency change and Irradiance Changes Understand subsurface changes underlying CMEs. Connection to Irradiance.

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Two HMI Seismic Goals: One Local and One Global

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  1. Two HMI Seismic Goals: One Local and One Global Philip R. Goode Big Bear Solar Observatory New Jersey Institute of Technology

  2. HMI Seismic Goals • Understand origin of frequency change and Irradiance Changes • Understand subsurface changes underlying CMEs Big Bear Solar Observatory

  3. Connection to Irradiance • What happens near solar surface when activity rises? • Does temperature increase or decrease? • Does radius expand or shrink? • Learn from behavior of f-modes and p-modes • What are the limits on what we can know at present? Big Bear Solar Observatory

  4. Sunspot number, p- and f-mode temporal means • g’s track sunspot number • f-mode spectrum is sparser Big Bear Solar Observatory

  5. Difference between Max. and Min. • Note opposing frequency dependences • f-modes (l=185-300) • Separate origins • Need more precise global frequencies at the extremes Big Bear Solar Observatory

  6. f-mode and p-mode B-field kernels Big Bear Solar Observatory

  7. f-mode and p-mode Turbulent velocity kernels Big Bear Solar Observatory

  8. Big Bear Solar Observatory

  9. Big Bear Solar Observatory

  10. Permanent Subsurface Changes After CMEs • Permanent changes to field configuration after large flares/CMEs • Different Pictures Predict Different Changes in Subsurface Field • Use Local Helioeismology to Track Dynamic d-Spot Regions Big Bear Solar Observatory

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