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A Sub-pc-scale Acceleration of the Radio Jet of NGC 6251

Published online by Cambridge University Press:  13 May 2016

Hiroshi Sudou ,
Yoshiaki Taniguchi ,
Osamu Kaburaki ,
Youichi Ohyama ,
Seiji Kameno ,
Satoko Sawada-Satoh ,
Makoto Inoue  and
Tetsuo Sasao
Hiroshi Sudou
Affiliation:
Astronomical Institute, Graduate School of Science, Tohoku University, Aoba, Sendai, Miyagi, Japan
Yoshiaki Taniguchi
Affiliation:
Astronomical Institute, Graduate School of Science, Tohoku University, Aoba, Sendai, Miyagi, Japan
Osamu Kaburaki
Affiliation:
Astronomical Institute, Graduate School of Science, Tohoku University, Aoba, Sendai, Miyagi, Japan
Youichi Ohyama
Affiliation:
National Astronomical Observatory, 2-21-1 Osawa, Mitaka, Tokyo, Japan
Seiji Kameno
Affiliation:
National Astronomical Observatory, 2-21-1 Osawa, Mitaka, Tokyo, Japan
Satoko Sawada-Satoh
Affiliation:
National Astronomical Observatory, 2-21-1 Osawa, Mitaka, Tokyo, Japan
Makoto Inoue
Affiliation:
National Astronomical Observatory, 2-21-1 Osawa, Mitaka, Tokyo, Japan
Tetsuo Sasao
Affiliation:
National Astronomical Observatory, 2-21-1 Osawa, Mitaka, Tokyo, Japan

Abstract

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In order to investigate the genesis of powerful radio jet, we have mapped the central 10 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-parsec-scale counterjet for the first time in this radio galaxy. This discovery allows us to investigate the jet acceleration based on the relativistic beaming model.

Type
The Inner Regions of Galaxies
Information
Symposium - International Astronomical Union , Volume 205: Galaxies and their Constituents at the Highest Angular Resolutions , 2001 , pp. 144 - 145
Copyright
Copyright © Astronomical Society of the Pacific 2001 

References

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