Advertisement

Solar Physics

, Volume 73, Issue 1, pp 105–119 | Cite as

Analysis of the high-resolution x-ray spectra obtained aboard the intercosmos 16 satellite

I: Identification of the lines in the 9.14–9.33 Å spectral region
  • V. V. Krutov
  • V. V. Korneev
  • U. I. Karev
  • V. M. Lomkova
  • S. N. Oparin
  • A. M. Urnov
  • I. A. Zhitnik
  • G. Bromboszcz
  • M. Siarkowski
  • J. Sylwester
  • S. Vasha
Article

Abstract

The Bragg-type, flat ADP crystal spectrometer, launched on board the INTERCOSMOS 16 satellite has been used for measurements of the X-ray spectra emitted from solar active region plasmas. During the period of the instrument operation (August–September, 1976) only a few active regions were present on the Sun (minimum of the solar activity). About 60 spectra have been registered. In the present paper using a spectrum averaged over 20 scans, we measured the wavelengths corresponding to the statistically significant spectral features seen in this spectrum in the wavelength range 9.14–9.33 Å. By comparison with the calculated line wavelengths and intensities predicted in the framework of the thermal model of the ‘average’ active region, we performed the identification of these features. Besides rather prominent resonance, intercombination, and forbidden lines of the He-like ion Mg xi, it was possible to identify the satellite lines which correspond to 1s2nl - 1s2p nl transitions from the states with n = 2, 3, and 4. The present paper is the first in a series dealing with the INTERCOSMOS 16 Mg xi spectra.

Keywords

Active Region Wavelength Range Spectral Feature Solar Activity Thermal Model 
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.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Bely-Dubau, F., Gabriel, A. H., and Volonte, S.: 1979, Monthly Notices Roy. Aston. Soc. 189, 801.Google Scholar
  2. Bhalla, C. P., Gabriel, A. H., and Presnyakov, L. P.: 1975, Monthly Notices Roy. Astron. Soc. 172, 359.Google Scholar
  3. Boiko, V. A., Faenov, A. Ya., and Pikuz, S. A.: 1978, J. Quant. Spectr. Radiat. Transfer 19, 11.Google Scholar
  4. Bonnelle, C., Senemaud, C., Senemaud, G., Chambe, G., Guionnet, M., Henoux, J. C., and Michard, R.: 1973, Solar Phys. 29, 341.Google Scholar
  5. Doschek, G. A., Feldman, U., Kreplin, R. W., and Cohen, L.: 1979, Astrophys. J. 239, 725.Google Scholar
  6. Eissner, W., Jones, M., and Nussbaumer, H.: 1974, Comput. Phys. Commun. 8, 270.Google Scholar
  7. Gabriel, A. H.: 1972, Monthly Notices Roy. Astron. Soc. 160, 99.Google Scholar
  8. Gabriel, A. H. and Jordan, C.: 1969, Monthly Notices Roy. Astron. Soc. 145, 241.Google Scholar
  9. Gabriel, A. H. and Jordan, C.: 1970, Phys. Letters 32A, 166.Google Scholar
  10. Gabriel, A. H. and Jordan, C.: 1973, Astrophys. J. 186, 327.Google Scholar
  11. Gabriel, A. H. and Paget, T. M.: 1972, J. Phys. B5, 673.Google Scholar
  12. Korneev, V. V., Krutov, V. V., Mandelstam, S. L., Urnov, A. M., Zhitnik, I. A., Kononov, A. Ya., Sylwester, B., and Sylwester, J.: 1979a, Solar Phys. 63, 319.Google Scholar
  13. Korneev, V. V., Krutov, V. V., Mandelstam, S. L., Urnov, A. M. Zhitnik, I. A., Golts, E.Ya., Kononov, E. Ya., and Sidelnikov, Y. V.: 1979b, Solar Phys. 63, 329.Google Scholar
  14. Mazing, M. A.: 1977, Vth International Conference on X-ray and UV Spectroscopy for Astrophys. and Laboratory Plasma, London, Abstracts of Reports.Google Scholar
  15. Mewe, R. and Schrijver, J.: 1978a, Astron. Astrophys. 65, 99.Google Scholar
  16. Mewe, R. and Schrijver, J.: 1978b, Astron. Astrophys. 65, 115.Google Scholar
  17. Mewe, R. and Schrijver, J.: 1978c, Astron. Astrophys. Suppl. Ser. 33, 311.Google Scholar
  18. Mewe, R., Schrijver, J., and Sylwester, J.: 1980, Astron. Astrophys. 87, 55.Google Scholar
  19. Parkinson, J. H.: 1972, Nature Phys. Sci. 236, 68.Google Scholar
  20. Parkinson, J. H.: 1975, Solar Phys. 42, 183.Google Scholar
  21. Presnyakov, L. P.: 1976, Uspekhi Fizicheskih Nauk 119, 49.Google Scholar
  22. Pye, J. P., Evans, K. D., Hutcheon, R. J., Gerrasimenko, M., Davis, J. M., Krieger, A. S., and Vesecky, J. F.: 1978, Astron. Astrophys. 65, 123.Google Scholar
  23. Steenman-Clark, L., Bely-Dubau, F., and Faucher, P.: 1980, Monthly Notices Roy. Astron. Soc., 191, 951.Google Scholar
  24. Summers, H. P.: 1973, Astrophys. J. 179, L45.Google Scholar
  25. Vainshtein, L. A. and Safronova, U. I.: 1978, Atom. Data and Nuclear Data Tables 21, 49.Google Scholar
  26. Vainshtein, L. A. and Safronova, U. I.: 1980, private communication.Google Scholar
  27. Vainshtein, L. A., Safronova, U. I., and Urnov, A. M.: 1980, Monthly Notices Roy. Astron. Soc., submitted.Google Scholar

Copyright information

© D. Reidel Publishing Co 1981

Authors and Affiliations

  • V. V. Krutov
    • 1
  • V. V. Korneev
    • 1
  • U. I. Karev
    • 1
  • V. M. Lomkova
    • 1
  • S. N. Oparin
    • 1
  • A. M. Urnov
    • 1
  • I. A. Zhitnik
    • 1
  • G. Bromboszcz
    • 2
  • M. Siarkowski
    • 3
  • J. Sylwester
    • 3
  • S. Vasha
    • 4
  1. 1.Lebedev Physical InstituteMoscowU.S.S.R.
  2. 2.Astronomical Observatory of Wrocław UniversityWrocławPoland
  3. 3.Space Research Center of the Polish Academy of SciencesWrocławPoland
  4. 4.Institute of Physics and Technics of the Mongolian Academy of SciencesU.S.A.

Personalised recommendations