Unit:
Κατεύθυνση Αστροφυσική, Αστρονομία και Μηχανική (ΒΑΣΙΚΗ ΦΥΣΙΚΗ)Library of the School of Science
Author:
Kerasioti Stefania
Supervisors info:
Νεκτάριος Βλαχάκης, Αναπληρωτής Καθηγητής, τμήμα Φυσικής, Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών
Απόστολος Μαστιχιάδης, Καθηγητής, τμήμα Φυσικής, Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών
Κοσμάς Γαζέας, Λέκτορας, τμήμα Φυσικής, Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών
Original Title:
Φαινόμενη Κίνηση και Μεταβλητότητα της Παρατηρούμενης Ακτινοβολίας σε Αστροφυσικούς Πίδακες Ενεργών Γαλαξιών
Translated title:
Apparent Motion and Variability of the Observed Radiation in Active Galactic Nuclei Jets
Summary:
Very long baseline interferometry (VLBI), offers high resolution images of parsec scale structures of AGN jets. Systematic observations and polarization measurements provide significant informations on the variability, dynamical evolution of jet components and magnetic field structure.
Here we study apparent motion and synchrotron radiation properties from a non thermal particle distribution that propagates along the jet, following dynamical flow lines that correspond to a radial-self similar MHD model. Such a motion can produce a variability in flux due to Doppler boosting, as well as a continuous change of the electric vector position angle (EVPA). In addition, we discuss main aspects of transverse profile of intensity, polarization and rotation measure (RM), for resolved, continuous jets.
Main subject category:
Science
Other subject categories:
Physics
Keywords:
MHD, AGNs: jets, synchrotron radiation, polarization
