Probing the nature of multiple lobe-like emissions in 3C 84
Abstract
The bright radio source 3C 84 has a CSO-like feature in the central 10-pc scale with extended emissions on scale up to kpc. Our kinematic and synchrotron age measurements support that the innermost feature is a CSO formed by recent restarted activity before the radio emission that originated in the earlier activities has completely faded. The average rate of the jet power of the innermost feature over the source age is at least ∼1044 erg s–1. Synchrotron age constraint for an outer lobe-like feature beyond the central CSO indicates that this feature originates in the outburst from ∼1.3×105 years ago. Inferred duty cycle of the jet ejection is much shorter than the time scale expected from microquasars (© 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
