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Detection of the VLBI-scale Counter Jet in NGC 6251
Preprint
H. Sudou ,
Y. Taniguchi ,
Y. Ohyama ,
S. Kameno ,
S. Sawada-Satoh ,
M. Inoue ,
O. Kaburaki ,
S. Sasao
11 April 2000
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Abstract
Mapping the central 5 pc region of the nearby radio galaxy NGC 6251 with a 0.2 pc resolution using VLBI at two radio frequencies, 5 GHz and 15 GHz, we have found the sub-pc-scale counter jet for the first time in this radio galaxy. This discovery allows us to investigate the jet acceleration based on the relativistic beaming model (Ghisellini et al. 1993).