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Hal Zirin   Submitted: 2000-05-17 18:03

  ABSTRACT We present new observations of weak solar magnetic fields with a technique, which we term the spectro-videomagnetograph (SP-VMG). We apply tests to hundreds of measurements of the Stokes V-component both for the 5250 line (y=3) and the 5247 line (y=2) and show that the filling factor of the magnetic measurements is near unity, that is the field strengths are actually what we measure them to be for fields above 500 gauss. This contradicts the commonly held belief that the fields are much stronger, but only fill a fraction of the optical resolution element. While we cannot specify the filling factor for fields below 500 gauss, there is now no evidence for a lower limit.

Authors: Harold Zirin and Robert Cameron ;;Solar Astronomy, California Institute of Technology, Pasadena, CA 91125

Publication Status: Ap J letters (submitted) Preprint is at
Last Modified: 2000-05-17 18:03
Go to main E-Print page  Coronal Structures as Tracers of Sub-Surface Processes  Tomography of the Soft X-Ray Corona: Measurements of Electron Densities, Temperatures, and Differential Emission Measure Distributions above the Limb  Edit Entry  Download Preprint  Delete Entry 

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