Skip to main content
SpringerLink
Log in

Field azimuth disambiguation using ambiguity-free currents

  • Published:
Solar Physics Aims and scope Submit manuscript

Abstract

Using the ambiguity-free vertical current defined by Semel and Skumanich (1995) we derive a minimum-current azimuth disambiguation for the observed magnetic field in the active region NOAA 7201. A comparison of such a minimum-current azimuth resolution with those from other extant methods indicates that the resulting resolution, even though found to be limited by noise, is a useful first approximation. A comparison of our minimum current distribution with the currents we derive from an extant disambiguation (Lites et al., 1995) indicates the presence of current discontinuities in the form of linear features near the magnetic neutral line of the associated δ-spot.

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

  • de la Beaujardière, J.-F., Canfield, R. C., and Leka, K. D.: 1993, Astrophys. J. 411, 378

    Google Scholar 

  • Fan, Y., Canfield, R. C., and McClymont, A. N.: 1990, B.A.A.S. 22, 827

    Google Scholar 

  • Hagyard, M. J.: 1988, Solar Phys. 115, 107

    Google Scholar 

  • Landi Degl'Innocenti, E. and Bommier, V.: 1993, Astrophys. J. Lett. 411, L49

    Google Scholar 

  • Leka, K. D., Canfield, R. C., McClymont, A. N., de la Beaujardière, J.-F., Fan, Y., and Tang, F.: 1993, Astrophys. J. 411, 370

    Google Scholar 

  • Leka, K. D., van Driel-Gesztelyi, L., Nitta, N., Canfield, R. C., Mickey, D. L., Sakurai, T., and Ichimoto, K.: 1994, Solar Phys. 155, 301

    Google Scholar 

  • Lites, B. W., Low, B. C., Martínez Pillet, V., Seagraves, P., Skumanich, A., Frank, Z. A., Shine, R. A., and Tsuneta, S.: 1995, Astrophys. J. 446, 877

    Google Scholar 

  • Lites, B. W. and Skumanich, A.: 1990, Astrophys. J. 348, 747

    Google Scholar 

  • Semel, M.: 1967, Ann. d'Astrophys. 30, 513

    Google Scholar 

  • Semel, M. and Skumanich, A.: 1995 (in preparation)

  • Skumanich, A. and Lites, B. W.: 1987, Astrophys. J. 322, 473

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. High Altitude Observatory, NCAR, 80302, Boulder, CO, U.S.A.

    A. Skumanich

  2. Observatoire de Paris, URA 326 (CNRS), F 92195, Meudon, Cedex, France

    M. Semel

Authors
  1. A. Skumanich
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. M. Semel
    View author publications

    You can also search for this author in PubMed Google Scholar

Additional information

The National Center for Atmospheric Research is funded by the National Science Foundation

Rights and permissions

Reprints and permissions

About this article

Cite this article

Skumanich, A., Semel, M. Field azimuth disambiguation using ambiguity-free currents. Sol Phys 164, 291–302 (1996). https://doi.org/10.1007/BF00146641

Download citation

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF00146641

Key words

Search

Navigation