The Unusual Emission Structure 140 PC from the Core in the Jet of the Radio Galaxy 3c 120

We present Very Long Baseline Array observations of the radio galaxy 3C 120 during 2010, revealing the existence of a very unusual component (hereafter C80) located at 80 mas (deprojected to 140 pc) with a brightness temperature ≈ 600 times higher than expected at such distance from the core. No significant changes in the position and flux density of C80 has been observed from its discovered up to these new observations suggesting that it may be associated with a strong recollimation shock. Components downstream of C80 move at superluminal velocities, resembling the situation near the HST-1 component in M87.

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