Modeling of Physical Processes by Analysis of Hard X-Ray and Microwave Radiations in the Solar Flare of November 10, 2002 |
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Authors: | Yu?E?Charikov Email author" target="_blank">A?N?ShabalinEmail author S?A?Kuznetsov |
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Institution: | 1.Ioffe Physical and Technical Institute,Russian Academy of Sciences,St. Petersburg,Russia;2.Central Astronomical Observatory at Pulkovo of the Russian Academy of Sciences,St. Petersburg,Russia |
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Abstract: | For electron acceleration during solar flares, it is very important to determine the pitch-angle and energy dependences of the electron distribution function. At present, this cannot be done directly from observations. Therefore, it is necessary to perform a numerical simulation of the propagation of accelerated electrons in the magnetic field of the flare loop (loops) and calculate the X-ray and radio emissions. For the solar flare of November 10, 2002, we have obtained qualitative and quantitative agreements of modeled X-ray and radio maps with the RHESSI satellite and Nobeyama Radioheliograph data. We have determined the flare model parameters that agree with observations. The pitch-angle anisotropy of electrons determined by highly directional functions of the S(α) = cos8(α) type, the energy spectrum consist of two electron populations, the low-energy part of the spectrum up to an energy of break of 350 keV is characterized by a power law with the exponent δ1 = 2.7–2.9, and the energy spectrum is more rigid above 420 keV (δ2 = 2–2.3). |
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