(Online PhD Colloquium) - TBD

Promotionskolloquium
Ms. Efthalia Traianou
CANCELED
MPI für Radioastronomie

(Online PhD Colloquium) - TBD

High Resolution VLBI Studies of the Blazars TXS 2013+370, OJ 287, and 3C 454.3

Promotionskolloquium
Ms. Efthalia Traianou
SCHEDULED
MPI für Radioastronomie

Blazars are the most luminous sub-class of active galactic nuclei (AGN). Powered by an accreting supermassive black hole (SMBH), these systems are characterized by an axisymmetric pair of powerful relativistic jets that emanate from their central region and are closely aligned to our line of sight. Thanks to this geometrical coincidence, blazars constitute a unique case of astrophysical objects in which we can study the extreme physical conditions associated with the jet launching region and the strong magnetic fields in the vicinity of the central engine. To date, a number of open questions are related to those objects. In this thesis, the origin of the high-energy emission and the seed photon field, the true nature of the observed jet base, and the jet phenomenology are investigated. For this purpose, we employ a state-of-the-art observational technique called Very-Long-Baseline Interferometry (VLBI). Simultaneous radio observations at 86 GHz using the largest radio antennas in the world, as well as complementary observations of ground array elements with the space radio telescope RadioAstron, give us the unique opportunity to focus on three case studies: the blazars TXS 2013+370, OJ 287 and 3C 454.3. [Referees: Prof. Dr. Anton Zensus, Prof. Dr. Andreas Eckart, Prof. Dr. Carsten Münker, Dr. Steffen Rost]