Applied Mathematics Seminar

The spectrovideomagnetograph (SPVMG), developed in 1993 by combining the videomagnetograph and a Littrow spectrograph, permits the direct measurement of Zeeman V splittings for fields as weak as 5-10 gauss. Stenflo had proposed that the fields are not weak , but strong invisible spots with at iny filling factor. We have applied his measure for the 5250/5247 ratio of thousands of photospheric magnetic elements and found the ratio of 5250:5247 is closely proportional to the g-factor, showing that the fields are what we measure them to be.

We also find that there is magnetic field everywhere on the Sun with intensities 5-20 gauss.

Finally we find extremely complex Zeeman patterns in sunspot penumbrae.