Name of the Speaker(s): Vasilii Gvaramadze
Institution: Abastumani Astrophysical Observatory, Tbilisi, Republic of Georgia
Title of the communication: A model of unsteady jet formation
Preliminary abstract (12 lines max.): We propose a model of unsteady jet formation in a system consisting of a black hole and a magnetized accretion disk. Accumulation and/or generation of strong large-scale magnetic fields in the inner part of the accretion disk play a key role in accretion instabilities, which lead to the sudden destruction and subsequent collapse of the accretion funnel. In this cataclismic process a strong energy concentration occurs on the disk's symmetry axis, that leads to the ejection of a pair of blobs moving in opposite directions perpendicular to the disk's plane. Frequent and unidirected ejections of blobs may mimic quasi-steady outflows.