Origin of ‘‘Bursts in Absorption’’ in the Jovian Decameter Radio Emission

Abstract

An interpretation of the slow-drift ‘‘bursts in absorption’’ observed against the background of Jovian decameter radio emission with a quasi-harmonic structure is given. According to the proposed model, the quenching of cyclotron instability as a result of filling the ‘‘loss cone’’ of the distribution function of emitting ions is responsible for the formation of bursts in absorption. The ions being injected into the emission generation region at the lower boundary of the source and propagating along magnetic field lines fill the loss cone. The parameters of the injected ions needed for the formation of bursts in absorption are estimated by comparing the model parameters with the observed ones.