Hostname: page-component-78c5997874-g7gxr Total loading time: 0 Render date: 2024-11-04T19:00:52.855Z Has data issue: false hasContentIssue false
  • English
  • Français

On X-ray radiation of the quiet Sun

Published online by Cambridge University Press:  14 August 2015

S. L. Mandelshtam
S. L. Mandelshtam*
Affiliation:
P. N. Lebedev Physical Institute of the U.S.S.R. Academy of Sciences

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The conditions of production of the solar X rays are briefly discussed. The comparison of the results of recent calculations and experimental measurements supports the assumption of a thermal origin of the X ray radiation. In the “tail” of the solar spectrum below 15 Å, the main contribution comes from the free-bound radiation of electrons and ions of carbon, nitrogen, oxygen and other elements.

The solar X ray radiation consist of a “quasi-stable” component, produced in undisturbed coronal regions and a “slowly varying” component generated in the active regions of the corona.

On discute les conditions de production de rayons X solaires. La comparaison des calculs récents avec les observations confirme l'hypothèse de l'origine thermique. Dans la région λ < 15 Å du spectre solaire, la contribution principale est due aux émissions free-bound des electrons et des ions du carbone, de l'azote, de l'oxygène et d'autres éléments.

L'émission X du Soleil a deux composantes; l'une à peu près constante due à l'émission des régions non perturbées de la couronne, l'autre, à variations lentes, provient des régions coronales actives.

Резюме

Резюме

Кратко расматриваются условия генерации рентгеновского излучения в солнечной короне. Сопаставление результатов вычислений с экспериментальными данными подтверждает гипотезу о термическом характере рентгеновского излучения спокойного солнца. В области спектра λ < 15 Å основной вклад дает свободно- связанное излучение электронов и ионов углерода, кислерода, азота и других элементов.

Рентгеновское излучение солнца состоит из квазипостоянной компоненты, генерируемой невозмущенными областями короны и « медленноменяюшейся компоненты » генерируемой активныим обла„ стями короны.

Type
Session II. X and γ Radiation : The Sun
Information
Symposium - International Astronomical Union , Volume 23: Astronomical Observations from Space Vehicles , 1965 , pp. 81 - 89
Copyright
Copyright © CNRS 1965 

References

1. Mandelshtam, S. L., Prokudina, N. S., Tindo, I. P., Fetisov, E. P., Kosmicheskije Issledovanija (in press).Google Scholar
2. Blake, R. L., Chubb, T. A., Friedman, H., Unzioker, A. E., 1963, Ap. J., 137, 3.Google Scholar
3. Tousey, R., 1964, Quarterly Journal at the Royal Astronomical soc. 5, 123.Google Scholar
4. Zhitnik, I. A., Krutov, V. V. Malyavkin, L. P., Mandelshtam, S. L., Kosmicheskije Issledovanija, 2, 920.Google Scholar
5. Waldmeier, M., 1963, Z. Astrophys., 58, 57 1964.Google Scholar
6. Elwert, G., 1954, Z. Naturforsch., 9a, 637.Google Scholar
7. Elwert, G., 1961, J. Geophys. Res., 66, 391.CrossRefGoogle Scholar
8. Chubb, T. A., Friedman, H., Kreplin, R. W., 1960, Space Research, I. North-Holland Publ. Co. Google Scholar
9. Mandelshtam, S., Tindo, I., Voron'ko, Yu., Vasilyev, B., Shurygin, A., Fetisov, E., XIII Astronaut. Congress, Varna, Bulgaria. IX, 1962. Springer Verlag, 1964.Google Scholar
10. Bowen, P. I., Pounds, K. A., Willmore, A. P. Norman, K., Sanford, P. W., 1964 Proc. Roy, Soc., A, 281, 538.Google Scholar
11. White, W. A., Space Research, IV. North-Holland Publ. Co., Amsterdam 1964.Google Scholar
12. Shklowsky, I. S., 1964, Astronomicheskij Journal, XLI, 676.Google Scholar
13. Fetisov, E. P., 1963, Kosmicheskije Issledovanija, 1, 209.Google Scholar
14. Burgess, A., 1964, Ap. J., 139, 776; Seaton, M., 1964, Planetary Space Sci., 12, 55.Google Scholar
15. Vainstein, L. A., 1961, Optics i Spetroskopy, 11, 301.Google Scholar
16. Pottasch, S. R., 1963, Ap. J., 137, 945.Google Scholar
17. Goldberg, L., Müller, E., Aller, L., 1960, Ap. J., suppl., 5, No 45.Google Scholar
18. U. S. Department of Commerce. N. B. S. Bull. G. R. P. L.-F. No. 213-214-219 Part B.Google Scholar
19. Tindo, I. P., Shurygin, A. I., Kosmicheskjei Issledovanija, in press.Google Scholar