Universität zu Köln

Sokolovskiy, Kirill V. (2010). Multi-frequency study of relativistic jets in active galactic nuclei. PhD thesis, Universität zu Köln.

Preview

PDF thesis.pdf - Published Version Download (14MB)

Abstract

The thesis at hand presents the results of multi-frequency Very Long Baseline Interferometry (VLBI) observations of jets associated with active galactic nuclei. The results are discussed in the context of broad-band jet emission models and used to constrain physical properties of the parsec-scale core -- inner part of the jet which is likely related to the observed high-energy emission. The analysis of the frequency-dependent core position shift supports interpretation of the parsec-core as the integral part of the jet; the observed core position is determined by opacity. Synchrotron self-absorption is found to be the dominating opacity mechanism in the observed sources. A comparison between radio sources possessing jets aligned closely to the line of sight with those aligned at large angles to it supports the idea that the bright extragalactic gamma-ray sources are associated with jets affected by relativistic beaming.

Item Type:	Thesis (PhD thesis)
Creators:	Creators Email ORCID ORCID Put Code Sokolovskiy, Kirill V. ksokolov@mpifr-bonn.mpg.de UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-41355
Date:	December 2010
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Physics > Institute of Physics I
Subjects:	Physics
Date of oral exam:	1 February 2011
Referee:	Name Academic Title Shao, Yaping Prof. Dr. Eckart, Andreas Prof. Dr. Zensus, J. Anton Prof. Dr.
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/4135