Analysis of the Solar Granulation in the Opacity Minimum Region

  • Serge Koutchmy
Conference paper
Part of the International Astronomical Union book series (IAUS, volume 138)


An observing program in the spectral region of the opacity minimum region near 1650 nm was started at NSO/SP—VTT many years ago and few results were presented. Thanks to an image processing unit connected to a rather conventional TV camera, IR images taken at 1650 nm can be displayed on the TV monitor and images stored on a VCR for subsequent comparison with corresponding images in the visible spectrum. This rather qualitative analysis is substantiated thanks to results coming from one—dimensional time series obtained with an IR pin—hole spectrophotometer. Power spectra of the o.m.r. granulation as well as its temporal behaviour are compared with results obtained using the same method in the optical region of the solar spectrum. Noticeable differences are emerging, including the reduced effect of 5-min oscillations.


Solar Phys Solar Atmosphere Brightness Distribution Crimean Astrophysical Observatory Solar Granulation 
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.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Bray, R.J., Loughhead, R.E. and Durrant, C.J. : 1984, “The Solar Granulation”,Cambridge Univ. Press.Google Scholar
  2. Keil, S.L. : 1980, Astron. Astrophys. 82, 144Google Scholar
  3. Koutchmy, S., Koutchmy, O. and Kotov, V. : 1977, Astron. Astrophys. 59, 189Google Scholar
  4. Koutchmy, S. and Lebecq, C. : 1986, Astron. Astrophys. 169, 323Google Scholar
  5. Title, A.M., Tarbell, T.D., Topka, K.P., Ferguson, S.H. and Shine, R.A. and the SOUP team : 1989, Ap.J. in pressGoogle Scholar
  6. Turon, P. : 1975, Solar Phys. 41, 271Google Scholar
  7. Turon, P.J. and Léna, P. : 1973, Solar Phys. 30, 3Google Scholar
  8. Vernazza, J.E., Avrett, E.H. and Loeser, R. : 1981, Ap.J. Suppl. 45, 635Google Scholar

Copyright information

© International Astronomical Union 1990

Authors and Affiliations

  • Serge Koutchmy
    • 1
    • 2
  1. 1.Institut d’Astrophysique CNRSParisFrance
  2. 2.NSO-Sacramento PeakUSA

Personalised recommendations