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Solar Physics

, Volume 54, Issue 2, pp 353–361 | Cite as

The mean magnetic field of the Sun: Observations at Stanford

  • Philip H. Scherrer
  • John M. Wilcox
  • Leif Svalgaard
  • Thomas L. DuvallJr.
  • Phil H. Dittmer
  • Eric K. Gustafson
Article

Abstract

A solar telescope has been built at Stanford University to study the organization and evolution of large-scale solar magnetic fields and velocities. The observations are made using a Babcock-type magnetograph which is connected to a 22.9 m vertical Littrow spectrograph. Sun-as-a-star integrated light measurements of the mean solar magnetic field have been made daily since May 1975. The typical mean field magnitude has been about 0.15 G with typical measurement error less than 0.05 G. The mean field polarity pattern is essentially identical to the interplanetary magnetic field sector structure (see near the Earth with a 4 day lag). The differences in the observed structures can be understood in terms of a ‘warped current sheet’ model.

Keywords

Magnetic Field Current Sheet Interplanetary Magnetic Field Field Polarity Typical Measurement 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

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Copyright information

© D. Reidel Publishing Company 1977

Authors and Affiliations

  • Philip H. Scherrer
    • 1
  • John M. Wilcox
    • 1
  • Leif Svalgaard
    • 1
  • Thomas L. DuvallJr.
    • 1
  • Phil H. Dittmer
    • 1
  • Eric K. Gustafson
    • 1
  1. 1.Institute for Plasma Research, Stanford UniversityStanfordUSA

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