Evolution of the mass accretion rate of the individual protostellar embryos during the evolution of models M1–M3. In model M1 the binaries are primary 1 and secondary 1 along with secondary 2 and secondary 3. In model M2 the binary is primary 2 and secondary 2. In model M3 the binaries are primary 1 and secondary 3 along with secondary 1 and secondary 2. The accretion rates for primary protostars and secondary protostars of each model are shown in the left and right panels, respectively. The accretion rate for each protostar is shown in units of log of solar mass per year. The time is indicated in years. The first spike for each appearing sink in all panels represents the formation of a protostar, which is followed by subsequent accretion bursts.