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K-Line emission and the integrated surface magnetic field on the sun

  • K. R. Sivaraman
  • R. Kariyappa
Additinal Papers
Part of the Lecture Notes in Physics book series (LNP, volume 254)

Abstract

We have made plots of the Ca II K line emission vs the global surface magnetic field for the sun for the years 1975–1982 representing both solar minimum as well as solar maximum epochs. These plots show that the K-line emission is not related to the global magnetic fields. An explanation for the absence of a correlation is offered. A direct measurement of the global magnetic field of the sun or similar stars will give an algebraic sum of the magnetic fields present on the surface, whereas the K-line emission will be additive Irrespective of the polarity of the fields. K-line emission being a sign insensitive indicator of magnetic field, is advantageous and with a proper calibration, the surface fields and the partition of fields according to signs can be evaluated through a calibration. This possibility is extended to sun-like stars where the presence of surface fields can be established reliably.

Keywords

Magnetic Field Solar Minimum Solar Maximum Surface Field Surface Magnetic Field 
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

  1. Sivaraman, K.-R., Jagdev Singh., Bagare, S.P. and Gupta, S.S. 1985, (In preparation)Google Scholar
  2. Skumanuich, A., Smythe, C. and Frazier, E.N. 1975, Astrophys. J. 200, 746.Google Scholar
  3. Solar Geophysical Data, Prompt Reports; Published by National Geophysical and Solar — Terrestrial Data Center Boulder, Colorado.Google Scholar
  4. White, O.R. and Suemoto, z. 1968, Solar Phys. 3, 523.CrossRefGoogle Scholar
  5. Wilson, O.C. 1978, Astrophys. J. 226, 379.CrossRefGoogle Scholar

Copyright information

© Springer-Verlag 1986

Authors and Affiliations

  • K. R. Sivaraman
    • 1
  • R. Kariyappa
    • 1
  1. 1.Indian Institute of AstrophysicsBangaloreIndia

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