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Дата изменения: Mon Feb 5 20:26:50 2001
Дата индексирования: Tue Oct 2 12:12:03 2012
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Seminars

All-Moscow Seminar of Astrophysicists
(ASA)

annotation of talk
Andrei Lobanov (MPIfR, Bonn, Germany))
Compact Extragalactic Jets.


Radiointerferometry has played a crucial part in the studies of compact extragalactic jets during the last several decades. Submilliarcsecond resolution of Very Long Baseline Interferometry (VLBI) has enabled detailed studies of morphological, kinematic and spectral properties of radioemission from the jets. We will present a review of results from several latest VLBI studies of extragalactic jets. In particular, we will discuss the results from three novel techniques of VLBI studies: space interferometry (Space VLBI), turnover frequency mapping, and using opacity effects in the jetts for probing the physical conidtions in the nuclear regions of AGN. Application of these methods has helped to understad better the evolutionary processes in the compact jets, in particularly the relative importance of relativistic shocks and plasma instabilities for the formation and development of relativistic flows on various linear scales.