An extensive analysis of the sub-parsec region of 3C 84

초록

The study of jet launching in AGN is an important research method to better understand super-massive black holes (SMBHs) and their immediate surroundings. The main theoretical jet launching scenarios invoke either magnetic field lines anchored to the black holes's (BH) accretion disc [1] or a magnetic field, which is directly connected to its rotating ergosphere [2]. The nearby and bright radio galaxy 3C 84 (NGC1275) is a very suitable target for testing different jet launching mechanisms, aswell as for the study of the innermost, sub-parsec scale AGN structure and the jet origin. Very long baseline interferometry (VLBI) - specifically at millimetre wavelengths - offers an unparalleled view into the physical processes in action, in the close vicinity of SMBHs. Utilising such mm-VLBI observations of 3C 84, we study the jet kinematics of the VLBI core region of 3C 84 by employing all available, high sensitivity 3 mm-VLBI data sets of this source. As part of this analysis we associate the component ejection events with the variability light-curves at different radio frequencies and in the.. -rays. Furthermore, by cross-correlating these light-curves, we determine their time-lags and draw conclusions regarding the location of the high energy emission close to the jet base.

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