Quiet Sun magnetic fields and the Total Solar Irradience (TSI) Roald Schnerr (Stockholm) Henk Spruit (MPIA)

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Presentation transcript:

Quiet Sun magnetic fields and the Total Solar Irradience (TSI) Roald Schnerr (Stockholm) Henk Spruit (MPIA)

TSI and the Solar cycle Fröhlich et al.

Magnetic fields and irradience Sheeley & Warren 2006 Magnetic field Intensity Start End Solar max

TSI predictions from synoptic data Wenzler et al 2004 IntensityMagnetic field Free parameter: facular filling factor

TSI modelling Wenzler et al 2004

Quiet Sun fields MHD sims of Quiet Sun with different B (Vögler 2005)

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

Magnetic field statistics Intensity vs B field, corrected for the “dark lane effect” SST active regionHinode Quiet Sun

Resolution vs TSI prediction ResolutionContrast (<50 G)ΔΦΔIΔI SST active region SST7.3%-- Hinode7.0%-0.51%+0.04% 1.14”4.2%-2.03%+0.3% Hinode Quiet Sun Hinode7.7% ”7.1%-17.7%-0.5%

Thanks!

B field histogram Intensity contr vs B fieldAdditional contribution of magnetic regions is ~2% (Hinode >50G) and 11% (SST > 200 G)

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