Skip to main content
SpringerLink
Log in

Influence of a sunspot penumbra on the oscillatory regime of neighboring regions

  • Published:
Astronomy Reports Aims and scope Submit manuscript

Abstract

The spectra of radial-velocity oscillations in the immediate vicinity of a sunspot beyond the observable boundary of the penumbra have been analyzed. The radial velocities were derived using a differential method. The oscillation spectra at two heights (lower photosphere and chromosphere) were compared with reference spectra for the middle penumbra and an unperturbed region obtained using the same method. The oscillatory regime characteristic of the sunspot penumbra extends more than 15″ beyond its observable boundary. It is proposed that deep photospheric layers in the region surrounding the penumbra have physical conditions similar to those observed inside its outer boundary.

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

  1. D. Degenhardt and E. Weihr, Astron. Astrophys. 287, 620 (1994).

    ADS  Google Scholar 

  2. B. W. Lites, in Dynamics and Fine Structure of Sunspots, Trans. IAU A, 23 (1997).

  3. A. M. Title, Z. Frank, R. A. Shine, et al., Astrophys. J. 403, 780 (1993).

    Article  ADS  Google Scholar 

  4. R. Schlichenmaier and W. Schmidt, Astron. Astrophys. 349, L37 (1999).

    ADS  Google Scholar 

  5. P. Borner and F. Kneer, Astron. Astrophys. 259, 307 (1992).

    ADS  Google Scholar 

  6. T. R. Rimmele, Astrophys. J. 445, 511 (1995).

    Article  ADS  Google Scholar 

  7. T. R. Rimmele, Astron. Astrophys. 298, 260 (1995).

    ADS  Google Scholar 

  8. S. K. Solanki, C. A. P. Montavon, and W. Livingston, Astron. Astrophys. 283, 221 (1994).

    ADS  Google Scholar 

  9. S. K. Solanki, W. Finsterle, I. Ruedi, and W. Livingston, Astron. Astrophys. 347, L27 (1999).

    ADS  Google Scholar 

  10. D. C. Stanchfield, II, J. H. Thomas, and B. W. Lites, Astrophys. J. 447, 485 (1997).

    ADS  Google Scholar 

  11. C. Westendorp Plaza, J. C. del Toro Iniesta, B. Rulz Cobo, et al., Nature 387, 47 (1997).

    ADS  Google Scholar 

  12. E. Wiehr and D. Degenhardt, Astron. Astrophys. 259, 313 (1992).

    ADS  Google Scholar 

  13. B. W. Lites, in Sunspots: Theory and Observations, Ed. by J. H. Tomas and N. O. Weiss (Kluwer, Dordrecht, 1992).

    Google Scholar 

  14. N. I. Kobanov, Astron. Zh. 77, 233 (2000) [Astron. Rep. 44, 202 (2000)].

    Google Scholar 

  15. N. I. Kobanov, Astron. Astrophys. 143, 99 (1985).

    ADS  Google Scholar 

  16. N. I. Kobanov, JOSO Annual Report, 1998, p. 118.

Download references

Author information

Authors and Affiliations

  1. Institute for Solar-Terrestrial Physics, P.O. Box 4026, Irkutsk, 664033, Russia

    N. I. Kobanov

Authors
  1. N. I. Kobanov
    View author publications

    You can also search for this author in PubMed Google Scholar

Additional information

__________

Translated from Astronomicheski\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) Zhurnal, Vol. 77, No. 12, 2000, pp. 940–943.

Original Russian Text Copyright © 2000 by Kobanov.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Kobanov, N.I. Influence of a sunspot penumbra on the oscillatory regime of neighboring regions. Astron. Rep. 44, 830–832 (2000). https://doi.org/10.1134/1.1327641

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1134/1.1327641

Keywords

Search

Navigation