Multi-epoch VLBA observations of 3C 66A

Details Multi-epoch VLBA observations of 3C 66A Multi-epoch VLBA observations of 3C 66A

2007-04-20

arxiv.org/abs/0704.2722v1

Astronomy and Astrophysics

Astrophysics

10 pages, 5 figures, received 30 January 2007, accepted 22 March 2007

Scientific paper

10.1051/0004-6361:20077155

We present the results of six-epoch Very Long Baseline Array (VLBA) observations of 3C~66A. The high-resolution Very Long Baseline Interferometer (VLBI) maps obtained at multi-frequency (2.3, 8.4, and 22.2 GHz) simultaneously enabled us to identify the brightest compact component with the core. We find that the spectrum of the core can be reasonably fitted by the synchrotron self-absorption model. Our VLBA maps show that the jet of 3C~66A has two bendings at about 1.2 and 4 mas from the core. We also give possible identifications of our jet components with the components in previous VLBA observations by analysing their proper motions. We find consistent differences of the position from the core in one component between different frequencies at six epochs.

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