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EVN monitoring observation of M 87 jet

Published online by Cambridge University Press:  24 February 2011

Keiichi Asada ,
Masanori Nakamura ,
Akihiro Doi ,
Hiroshi Nagai  and
Makoto Inoue
Keiichi Asada
Affiliation:
Institute of Astronomy and Astrophysics, Academia Sinica. P.O. Box 23-141, Taipei 10617, Taiwan, R.O.C. email: [email protected]
Masanori Nakamura
Affiliation:
Allan C. Davis Fellow, Department of Physics and Astronomy, The Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218; and Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218 email: [email protected]
Akihiro Doi
Affiliation:
Institute of Space and Astronautial Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Sagamihara, Kanagawa, 229-8510, Japan email: [email protected]
Hiroshi Nagai
Affiliation:
Institute of Space and Astronautial Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Sagamihara, Kanagawa, 229-8510, Japan email: [email protected]
Makoto Inoue
Affiliation:
Institute of Astronomy and Astrophysics, Academia Sinica. P.O. Box 23-141, Taipei 10617, Taiwan, R.O.C. email: [email protected]
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Abstract

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We report results of our European VLBI Network observations towards M 87 jet at 1.6 GHz in order to study the velocity field. We revealed continuous jet up to 500 mas from the core and HST-1 component. We have not detected any proper motion for the components within first 160 mas from the core and significant superluminal motions from 2.5 to 3.5 c for the HST-1 components. Those are in good agreement with previous observations. We derived proper motions for the components about 160 to 500 mas from the core. Interestingly, the measured proper motions are faster than that of the inner components and slower than that of HST-1 components. It may suggest the possible acceleration region for superluminal features of M 87 jet.

Keywords

instrumentation: high angular resolutiontechniques: interferometricgalaxies: activegalaxies: jets
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 6 , Symposium S275: Jets at all Scales , September 2010 , pp. 198 - 199
Copyright
Copyright © International Astronomical Union 2011

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