Influence of the ionized medium on synchrotron emission of intermediate energy electrons

The suppression of synchrotron emission at low frequencies, owing to the influence of the ionized medium, is investigated. Explicit expressions and detailed numerical values of the emission spectra are presented for various electron energies and plasma and cyclotron frequencies. Unlike previous studies of this suppression effect, which were applicable only to ultrarelativistic electrons, the present treatment is valid for electrons of arbitrary energies and in particular for intermediate energy electrons such as those presumably accelerated in solar flares.