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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

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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 

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