Formation of the spectrum of relativistic electrons in nonsteady sources of synchrotron radio emission

Astronomy and Astrophysics – Astronomy

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Electronic Spectra, Radio Sources (Astronomy), Relativistic Particles, Synchrotron Radiation, Decimeter Waves, Electron Density (Concentration), Field Strength, Magnetic Fields, Novae, Plasma Turbulence

Scientific paper

Observational data on decimetric radio bursts from Nova Mon 1975 and Nova Cyg 1975 are used to show that conditions for a 'synchrotron (plasma) turbulence boiler' are realized during early stages in the evolution of variable nonthermal radio sources. Calculations are performed which demonstrate that a power-law relativistic electron spectrum with an index of the order of unity and a sharp high-energy cutoff results and that the radio flux varies in accordance with Shklovskii's (1960) and Van der Laan's (1966) models of variable nonthermal radio sources. The magnetic-field strength and plasma electron density in the formation region of the radiating-particle spectrum are estimated for Nova Mon 1975, Nova Cyg 1975, and the N galaxy 3C 120.

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