Preliminary interpretation of the polarization measurements performed on ‘Intercosmos-4’ during three X-ray solar flares |
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| Authors: | Tindo I P Ivanov V D Valní?ek B Livshits M A |
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| Institution: | (1) P. N. Lebedev Physical Institute, Moscow, USSR;(2) Astronomical Institute of the Czechoslovak Academy of Sciences, Ond ejov, USSR;(3) Institute of Terrestrial Magnetism, Ionosphere and Radio-wave Propagation, (Izmiran), USSR |
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| Abstract: | Analysis of the X-ray polarization data at   0.8 Å for three major chromospheric flares shows that during the  hard phase of the flare the X-rays are polarized in the plane, the projection of which on the solar disc is going approximately from the flare region to the center of the disc. Simultaneously performed measurements of the spectral energy distribution have proved that observed X-rays are produced by the bremsstrahlung of the accelerated electrons with the energies in the range 10–100 keV. The experimental data are in good agreement with the flare model, which deals with the radial movement of accelerated electrons towards the photosphere, together with the continuous injection of these electrons into the emitting region.Presented to International Meeting on Solar Activity, IZMIRAN, November 15–22, 1971. |
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