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200 Milliarcsecond Structure in 3C 120

Published online by Cambridge University Press:  04 August 2017

J. M. Benson
Affiliation:
National Radio Astronomy Observatory*
R. C. Walker
Affiliation:
National Radio Astronomy Observatory*
G. A. Seielstad
Affiliation:
Owens Valley Radio Observatory
S. C. Unwin
Affiliation:
Owens Valley Radio Observatory

Extract

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We present VLBI and VLA maps of the superluminal radio source 3C 120 (z = 0.03). The 18 cm VLBI maps shown in Figures 1 and 2c were constructed from a 14 station VLBI observation on 10, 11 October 1982. The map in Figure 1 is at full spatial resolution. The Figure 2c map was made from a uv-tapered data set and shows the extended emission. The VLBI maps show a jet ~175 pc long with distinct knots and bends (H0 = 55 kms−1 Mpc−1). The 18 cm jet smoothly connects to the 6 cm superluminal jet (Figure 2d). The VLBI jet remains well collimated through several bends and only begins to spread out 100 pc beyond the core. At 175 pc from the core, the jet is wide and weak, and disappears into the under-sampled region of the uv-plane (< 2(10)6 λ's).

Type
Research Article
Copyright
Copyright © Reidel 1984