On the Radio Frequency Spectrum of Jupiter

Recent observations of the radio-frequency flux spectrum of Jupiter in the frequency range 80-10 000 MHz suggest that the synchrotron component is not independent of frequency as has been generally accepted. Rather, the flux decreases at frequencies below 300 MHz and above 3000 MHz. In this paper we show that extensions and variations of the well-known dipolar model for this emission can account for the modified spectrum.