Quiet Sun magnetic fields and the Total Solar Irradience (TSI)
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Quiet Sun magnetic fieldsand the Total Solar Irradience (TSI)
Roald Schnerr (Stockholm)Henk Spruit (MPIA)
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TSI and the Solar cycle
Fröhlich et al.
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Magnetic fields and irradience
Sheeley & Warren 2006
Magnetic field
Intensity
Start EndSolar max
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TSI predictions from synoptic data
Wenzler et al 2004
IntensityMagnetic field
Free parameter: facular filling factor
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TSI modelling
Wenzler et al 2004
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Quiet Sun fields
MHD sims of Quiet Sun with different B (Vögler 2005)
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Colours:
[B,G,R] = [80<B<400,400<B<700, B>700](SST)
[B,G,R] = [30<B<250, 250<B<650, B>650] (Hinode)
SST &Hinode
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Magnetic field statistics
Intensity vs B field, corrected for the “dark lane effect”
SST active region Hinode Quiet Sun
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Resolution vs TSI prediction
Resolution Contrast (<50 G) ΔΦ ΔI
SST active region
SST 7.3% - -
Hinode 7.0% -0.51% +0.04%
1.14” 4.2% -2.03% +0.3%
Hinode Quiet Sun
Hinode 7.7% - -
1.14” 7.1% -17.7% -0.5%
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Thanks!
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