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Time variation of the spectrum of Gyro-synchrotron emission from the Sun

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Abstract

The emission spectra and their time variations of gyro-synchrotron emission from an ensemble of energetic electrons are computed for some initial power-law distributions of the electron energies N(ε)dε=ε −γ with γ=2 or 4. The spectra and decay curves of the emission are compared with solar microwave bursts in order to separately estimate the magnetic field H and γ. From a limited number of observations, we have γ≈ 3 and H ≈ 103 gauss for the microwave impulsive bursts, and γ≈ 2 and H ≈ (500–1000) gauss for the microwave type-IV bursts.

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Authors and Affiliations

  1. Tokyo Astronomical Observatory, University of Tokyo, Mitaka, Tokyo, Japan

    Tatsuo Takakura, Yutaka Uchida & Keizo Kai

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  1. Tatsuo Takakura
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  2. Yutaka Uchida
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  3. Keizo Kai
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Takakura, T., Uchida, Y. & Kai, K. Time variation of the spectrum of Gyro-synchrotron emission from the Sun. Sol Phys 4, 45–57 (1968). https://doi.org/10.1007/BF00146997

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  • DOI: https://doi.org/10.1007/BF00146997

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