Skip to main content
SpringerLink
Log in

Magnetograph response to canopy-type fields

  • Published:
Solar Physics Aims and scope Submit manuscript

    We’re sorry, something doesn't seem to be working properly.

    Please try refreshing the page. If that doesn't work, please contact support so we can address the problem.

Abstract

The response of longitudinal-field magnetographs to magnetic fields which are semi-infinite or confined to a horizontal layer is discussed with respect to the interpretation of solar diffuse fields, observed towards the limb, in terms of magnetic canopy models. Numerical results are presented for several reference solar models and typical ‘calibration’ curves are shown for the C I 9111 Å, Fe I 8688 Å, and Ca II 8542 Å lines in magnetostatic atmospheres derived from a mean model. A procedure is developed for determining the base heights of magnetic canopies from observations with an uncertainty not exceeding the order of a pressure scale height. Until definitive information regarding atmospheric structure inside flux tubes can be developed from theory or observation, reliable field strengths cannot be derived from the data.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  • Allen, C. W.: 1973, Astrophysical Quantities, 3rd ed., Univ. London, The Athlone Press, p. 89.

  • Athay, R. G. and Lites, B.: 1972, Astrophys. J. 176, 809.

    Google Scholar 

  • Auer, L. H., Heasley, J. N., and House, L. L.: 1977, Astrophys. J. 216, 531.

    Google Scholar 

  • Beckers, J. M. and Milkey, R. W.: 1975, Solar Phys. 68, 49.

    Google Scholar 

  • Cowley, C. R.: 1971, Observatory 91, 139.

    Google Scholar 

  • Foukal, P. and Smart, M.: 1981, Solar Phys. 69, 15.

    Google Scholar 

  • Giovanelli, R. G.: 1980, Solar Phys. 68, 49.

    Google Scholar 

  • Giovanelli, R. G. and Jones, H. P.: 1981, Solar Phys. 79, 267 (this issue).

    Google Scholar 

  • House, L. L. and Steinitz, R.: 1975, Astrophys. J. 195, 235.

    Google Scholar 

  • Howard, R. and Stenflo, J. O.: 1972, Solar Phys. 22, 402.

    Google Scholar 

  • Jones, H. P.: 1982, Solar Phys. 79, 279 (this issue).

    Google Scholar 

  • Jones, H. P. and Skumanich, A.: 1980, Astrophys. J. Suppl. 42, 221.

    Google Scholar 

  • Livingston, W. and Harvey, J.: 1969, Solar Phys. 10, 294.

    Google Scholar 

  • Stenflo, J. O.: 1971, in R. Howard (ed.), ‘Solar Magnetic Fields’, IAU Symp. 43, 101.

  • Stenholm, L. G. and Stenflo, J. O.: 1978, Astron. Astrophys. 67, 33.

    Google Scholar 

  • Vernazza, J. E., Avrett, E. H., and Loeser, R.: 1981, Astrophys. J. Suppl. 45, 635.

    Google Scholar 

Download references

Author information

Author notes

  1. Ronald G. Giovanelli

    Present address: CSIRO Division of Applied Physics, P.O. Box 218, 2070, Linfield, N.S.W., Australia

Authors and Affiliations

  1. NASA/Goddard Space Flight Center, Laboratory for Astronomy and Solar Physics, Southwest Solar Station, Kitt Peak National Observatory, P.O. Box 26732, 85726, Tucson, Ariz., U.S.A.

    Harrison P. Jones

  2. Kitt Peak National Observatory, P.O. Box 26732, 85726, Tucson, Ariz., U.S.A.

    Ronald G. Giovanelli

Authors
  1. Harrison P. Jones
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Ronald G. Giovanelli
    View author publications

    You can also search for this author in PubMed Google Scholar

Additional information

Operated by the Association of Universities for Research in Astronomy, Inc., under contract with the National Science Foundation.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Jones, H.P., Giovanelli, R.G. Magnetograph response to canopy-type fields. Sol Phys 79, 247–266 (1982). https://doi.org/10.1007/BF00146243

Download citation

  • Received:

  • Revised:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF00146243

Keywords

Search

Navigation