Advertisement

Solar Physics

, Volume 29, Issue 2, pp 441–446 | Cite as

Solar X-ray spectra observed from the ‘Intercosmos-4’ satellite and the ‘Vertical-2’ rocket

  • Yu. I. Grineva
  • V. I. Karev
  • V. V. Korneev
  • V. V. Krutov
  • S. L. Mandelstam
  • L. A. Vainstein
  • B. N. Vasilyev
  • I. A. Zhitnik
Article

Abstract

Results are given of the detailed analysis of fourteen Fe xxv-xxiii lines (λ = 1.850–1.870 Å) in the spectra of a solar flare on 16 Nov. 1970. The spectra were obtained with a resolution of about 4 × 10−4 Å, which revealed lines not previously observed and allowed the measurement of line profiles. The measured values of the wavelengths and emission fluxes are presented and compared with theoretical calculations. The analysis of the contour of the Fe xxv line (λ = 1.850 Å) leads to the conclusion that there is unidirectional macroscopic gas motion in the flare region with the velocity (projection on the line of sight) ≈ ± 90 km s−1.

Measurements of the 8.42 Å Mg xii and 9.16 Å Mg xi lines in the absence of solar flares indicate prolonged existence of active regions on the solar disk with Te = 4−6 × 106K and emission measure ME ≈ 1048 cm−3. The profile of the Mg xii line indicates a macroscopic ion motion with a velocity up to 100 km s−1.

Keywords

Flare Active Region Theoretical Calculation Solar Flare Line Profile 
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. Beigman, I. L., Vainstein, L. A., Vasilyev, B. N., Zhitnik, I. A., Ivanov, V. D., Korneev, V. V., Krutov, V. V., Mandelstam, S. L., Tindo, I. P., and Shuryghin, A. I.: 1971, Kosmich. Issled. 9, No. 1, 123.Google Scholar
  2. Doschek, G. A., Meekins, T. F., Kreplin, R. W., Chubb, T. A., and Friedman, H.: 1971, Astrophys. J. 164, 1.Google Scholar
  3. Gabriel, A. H. and Jordan, C.: 1969, Nature 221, 947.Google Scholar
  4. Gabriel, A. H. and Paget, T. M.: 1971, preprint.Google Scholar
  5. Grineva, Yu. I., Karev, V. I., Korneev, V. V., Krutov, V. V., Mandelstam, S. L., Vainstein, L. A., Vasilyev, B. N., and Zhitnik, I. A.: 1971, Space Res. XII, in press.Google Scholar
  6. House, L. L.: 1969, Astrophys. J. 18, 21.Google Scholar
  7. Kane, S. R. and Anderson, K. A.: 1970, Astrophys. J. 162, 1003.Google Scholar
  8. Neupert, W. M. and Swartz, M.: 1970, Astrophys. J. 160, 189.Google Scholar
  9. Solar Geophysical Data: 1970, IER-FB, ESSA, Boulder, Colo.Google Scholar
  10. Tindo, I. P., Ivanov, V. D., Mandelstam, S. L., and Shuryghin, A. I.: 1972, Solar Phys. 24, 429.Google Scholar
  11. Vainstein, L. A. and Safronova, U. I.: 1972, Kratkie soobtch. po fiz., P. N. Lebedev Physical Institute, No. 3, p. 40.Google Scholar
  12. Vainstein, L. A., Zhitnik, I. A., Korneev, V. V., and Mandelstam, S. L.: 1972, Kratkie soobtch. po fiz., P. N. Lebedev Physical Institute, No. 3, p. 35.Google Scholar
  13. Vasilyev, B. N., Zhitnik, I. A., Korneev, V. V., Krutov, V. V., Mandelstam, S. L., Tindo, I. P., Tsheremukhin, G. S., and Shuryghin, A. I.: 1968, Kosmich. Issled. 6, No 3, 420.Google Scholar
  14. Vasilyev, B. N., Grineva, Yu. I., Zhitnik, I. A., Karev, V. I., Korneev, V. V., Krutov, V. V., and Mandelstam, S. L.: 1972, Kratkie soobtch. pofiz., P. N. Lebedev Physical Institute, No. 3, p. 29.Google Scholar

Copyright information

© D. Reidel Publishing Company 1973

Authors and Affiliations

  • Yu. I. Grineva
    • 1
  • V. I. Karev
    • 1
  • V. V. Korneev
    • 1
  • V. V. Krutov
    • 1
  • S. L. Mandelstam
    • 1
  • L. A. Vainstein
    • 1
  • B. N. Vasilyev
    • 1
  • I. A. Zhitnik
    • 1
  1. 1.Laboratory of Spectroscopy, Lebedev Institute, Academy of Sciences of the U.S.S.R.MoscowU.S.S.R.

Personalised recommendations