Mass and energy loss by a close binary system moving in the vicinity of an active galactic nucleus

The transformation of a close binary system in the strong gravitational field of an active galactic nucleus (AGN) leads to mass loss by the system in many cases. The main factor causing this loss is interaction between the components in the form of dynamic tides and collisions. Calculations showed that mass loss is accompanied by energy liberation in amounts large enough for this process to be observed as brief outbursts. Many properties of such outbursts are similar to those observed in AGNs, so very close encounters between components can be considered to be one possible cause of outburst activity.