Skip to main content
SpringerLink
Log in

Short-period variations in the proper motions of sunspots from SOHO (MDI) observations

  • Published:
Astronomy Reports Aims and scope Submit manuscript

Abstract

Short-period (1–60 min) variations in the coordinates of the centers of gravity of isolated sunspots are analyzed. The sunspot coordinated were determined using two sets of observational data—magnetograms and intensities—obtained by SOHO (MDI) on December 6, 1998, from 01:00 to 21:57 UT with temporal resolution 60 s and spatial resolution 0.6″/pixel. A slow drift in the sunspot coordinates was removed using a low-frequency filter with a 61-min integration window. The guiding errors (RMS∼0.014″) were determined by analyzing correlated motions in pairs of sunspots, and were removed from the time series before determining the sunspot proper motions. Based on the calculated power spectra for the sunspot proper motions, two period intervals containing appreciable power were identified. One coincides with the well-known 5-min acoustic solar oscillations. The concentration of power in this interval is greater for the coordinate variations derived the magnetograms than those derived from the intensities; the harmonic amplitude for some peaks reaches ∼±30 km. The other spectral interval corresponds to periods exceeding 30 min. Overall, the rms short-period variations in the sunspot proper motions are 9.9±2.2 and 16.7±7.6 km (0.014″±0.003″ and 0.024″±0.010″) for the magnetogram and intensity data, respectively.

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. R. S. Carrington, Observation of Spots on the Sun (1863), p. 222.

  2. H. F. Newall, Mon. Not. R. Astron. Soc. 85, 553 (1925).

    Google Scholar 

  3. F. J. Stratton, Mon. Not. R. Astron. Soc. 69, 659 (1909).

    ADS  Google Scholar 

  4. H. H. Turner, Mon. Not. R. Astron. Soc. 68, 98 (1907).

    ADS  Google Scholar 

  5. R. S. Gnevysheva, Astron. Zh. 18, 26 (1941).

    Google Scholar 

  6. V. E. Stepanov and M. A. Klyakotko, Izv. Krym. Astrofiz. Obs. 16, 80 (1956).

    Google Scholar 

  7. P. H. Scherrer, J. M. Wilcox, and L. Svalgaard, Astrophys. J. 241, 811 (1980).

    Article  ADS  Google Scholar 

  8. H. W. Newton and M. L. Nunn, Mon. Not. R. Astron. Soc. 111, 413 (1951).

    ADS  Google Scholar 

  9. R. Muller and Th. Roudier, Sol. Phys. 152, 131 (1994).

    Article  ADS  Google Scholar 

  10. G. Lustig and H. Wohl, Astron. Astrophys. 249, 528 (1991).

    ADS  Google Scholar 

  11. R. W. Komm, R. F. Howard, and J. W. Harvey, Sol. Phys. 147, 207 (1993).

    Article  ADS  Google Scholar 

  12. R. Muller, Th. Roudier, J. Vigneau, and H. Auffret, Astron. Astrophys. 283, 232 (1994).

    ADS  Google Scholar 

  13. V. Bumba, M. Klvana, and B. Kalman, Astron. Astrophys., Suppl. Ser. 118, 35 (1996).

    Article  ADS  Google Scholar 

  14. B. Anwar, L. W. Acton, H. S. Hudson, et al., Sol. Phys. 147, 287 (1993).

    Article  ADS  Google Scholar 

  15. F. Mazzuconi, C. Coveri, and G. Godoli, Sol. Phys. 125, 269 (1990).

    ADS  Google Scholar 

  16. P. H. Scherrer, R. S. Bogart, R. I. Bush, et al., Sol. Phys. 162, 129 (1995).

    Article  ADS  Google Scholar 

  17. P. H. Scherrer, private communication, 1999.

  18. T. L. Duvall, private communication, 1999.

Download references

Author information

Authors and Affiliations

  1. Crimean Astrophysical Observatory, p/o Nauchnyi, Crimea, 334413, Ukraine

    L. V. Didkovskii

Authors
  1. L. V. Didkovskii
    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. 953–960.

Original Russian Text Copyright © 2000 by Didkovski\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\).

Rights and permissions

Reprints and permissions

About this article

Cite this article

Didkovskii, L.V. Short-period variations in the proper motions of sunspots from SOHO (MDI) observations. Astron. Rep. 44, 841–847 (2000). https://doi.org/10.1134/1.1327643

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1134/1.1327643

Keywords

Search

Navigation