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Sunrise Inversion Strategies for IMaX Spectral Environment Analysis

This study explores the inversion strategies for analyzing the IMaX spectral environment in Sunrise, focusing on parameters like B-strength, LOS-velocity, azimuth, and more. Various inversion codes like VFISV and HeLiX+ are tested using data sets from 2009. Different test scenarios are analyzed to determine the correct parameters for local straylight correction. The study compares VFISV, HeLiX+, and SPINOR magnetograph formula for accuracy and feasibility of local straylight correction. Utilizing numerical RTE solver (SPINOR) is suggested for promising results. The research aims to enhance understanding and accuracy, particularly in regions with high LOS velocities and strong magnetic field gradients.

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Sunrise Inversion Strategies for IMaX Spectral Environment Analysis

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  1. Sunrise inversionStrategies Andreas Lagg

  2. The IMaXspectralenvironment

  3. The IMaXspectralenvironment

  4. The IMaXspectralenvironment

  5. The relevant environment FTS FTS * 85mA Gauss

  6. The relevant environment FTS * 85mA Gauss

  7. The relevant environment FTS * 85mA Gauss, 6 km/s upflow

  8. Milne-Eddington Inversion • 8 freeparameters:B-strength, -azimuth, -inclinationLOS-velocityDoppler-broadeningDampingparametersourcefunctiongradientsourcefunctionatτ=0 • 85 mÅ FWHM Gaussianconvolution IMaX filter • Inversion Codes:VFISV (Borrero), HeLiX+ (Lagg), … • Test Data Set: • 2009-06-09, 163-208

  9. VFISV: Continuumlevel 2009-06-09, 163-208

  10. VFISV: LOS-Velocity 2009-06-09, 163-208

  11. VFISV: Inclination 2009-06-09, 163-208

  12. VFISV: Azimuth 2009-06-09, 163-208

  13. VFISV: B (FF=1) 2009-06-09, 163-208

  14. HeLIx+: B(FF=1) 2009-06-09, 163-208

  15. localstraylightcorrection weight 1 additional freeparameter (FF) 2009-06-09, 163-208

  16. HeLIx+: B(FF=1), nolocalstraylight 2009-06-09, 163-208

  17. HeLIx+: Add localstraylight, BxFF 2009-06-09, 163-208

  18. HeLIx+: localstraylight, B strength 2009-06-09, 163-208

  19. HeLIx+: localstraylight, B inclination 2009-06-09, 163-208

  20. HeLIx+: localstraylight, magn. FF 2009-06-09, 163-208

  21. HeLIx+: localstraylight, B strength high B (1.5 kG)B vert. (11°)high FF (0.75) 2009-06-09, 163-208

  22. HeLIx+: localstraylight, B strength low B (110 G)B horiz (93°)high FF (0.75) 2009-06-09, 163-208

  23. HeLIx+: localstraylight, B strength 2009-06-09, 163-208

  24. HeLIx+: LOS-velocity, magn. comp. 2009-06-09, 163-208

  25. Inversions: ME vs. numerical RTE solver • 8 freeparameters: • B-strength • B-azimuth • B-inclination • LOS-velocity • Doppler-broad. • Dampingparameter • sourcefunc grad • sourcefuncatτ=0 • fast & simple • 7 freeparameters: • B-strength • B-azimuth • B-inclination • LOS-velocity • Micro-Turbulence • Macro-Turbulence • Temperatureatτ=0 • ‚physical‘ param. • multi-line • complexatmosphereeg. gradients • slow

  26. SPINOR Fit to FTS caneasily handle ±6km/s

  27. Milne Eddington Num. RTE Solver

  28. Milne Eddington Num. RTE Solver

  29. Summary & Outlook • Goodagreement:VFISV ↔ HeLIx+ ↔ SPINORmagnetographformula? • LocalStraylightcorrectionisfeasible • Numerical RTE Solver (SPINOR) promising • Determinecorrectparametersforlocalstraylightcorrection (limbdata) • implementlocal-straylightto SPINOR • compare VFISV ↔ SPINOR maps • high LOS velocities: testlineblending • strong fieldregions: test VLOS, B-gradient

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