Hostname: page-component-745bb68f8f-f46jp Total loading time: 0 Render date: 2025-01-31T14:43:32.276Z Has data issue: false hasContentIssue false
  • English
  • Français

The Counterjet in the Nucleus of Centaurus A

Published online by Cambridge University Press:  12 April 2016

R.A. Preston ,
S.J. Tingay ,
D.L. Jones ,
D.W. Murphy ,
D.L. Meier ,
D.L. Jauncey ,
J.E. Reynolds ,
A.K. Tzioumis ,
J.E.J. Lovell  and
P.M. McCulloch
...Show all authors
R.A. Preston
Affiliation:
Jet Propulsion Laboratory, Caltech, Pasadena, CA 91109, U.S.A.
S.J. Tingay
Affiliation:
Jet Propulsion Laboratory, Caltech, Pasadena, CA 91109, U.S.A.
D.L. Jones
Affiliation:
Jet Propulsion Laboratory, Caltech, Pasadena, CA 91109, U.S.A.
D.W. Murphy
Affiliation:
Jet Propulsion Laboratory, Caltech, Pasadena, CA 91109, U.S.A.
D.L. Meier
Affiliation:
Jet Propulsion Laboratory, Caltech, Pasadena, CA 91109, U.S.A.
D.L. Jauncey
Affiliation:
CSIRO, Australia Telescope National Facility, NSW 2121, Australia
J.E. Reynolds
Affiliation:
CSIRO, Australia Telescope National Facility, NSW 2121, Australia
A.K. Tzioumis
Affiliation:
CSIRO, Australia Telescope National Facility, NSW 2121, Australia
J.E.J. Lovell
Affiliation:
University of Tasmania, Hobart, Tasmania 7001, Australia
P.M. McCulloch
Affiliation:
University of Tasmania, Hobart, Tasmania 7001, Australia
M.E. Costa
Affiliation:
University of Tasmania, Hobart, Tasmania 7001, Australia
G. Nicolson
Affiliation:
Hartebeesthoek Radio Astronomy Observatory, Krugersdorp, South Africa

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We have observed the nucleus of Centaurus A with the VLBA and the SHEVE arrays, individually and in combination. In sensitive experiments at 8.4 GHz which use both arrays together we have detected components in a sub-parsec-scale counterjet. The counterjet is also seen in 2.3 and 22 GHz images. The nuclear region appears to be partially obscured by a free-free absorbing structure of about 1 pc in extent. The jet axis appears to lie at a 50°–70° angle to our line of sight.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 164: Radio Emission from Galactic and Extragalactic Compact Sources , 1998 , pp. 91 - 92
Copyright
Copyright © Astronomical Society of the Pacific 1998

References

Jauncey, D.L., et al. 1995. Proc. Natl. Acad. Sci. USA, 92, 11368–11370.Google Scholar
Jones, D.L., et al. 1996. ApJ, 466, L63–65.CrossRefGoogle Scholar
Preston, R.A., et al. 1996. in IAU Symp. 175, Extragalactic Radio Sources, eds. Ekers, R., Fanti, C. & Padrielli, L., (Dordrecht: Kluwer), 21–22.Google Scholar
Tingay, S.J., et al. 1996. in Energy Transport in Radio Galaxies and Quasars, eds. Hardee, P.E., Bridle, A.H., & Zensus, J.A. (San Francisco: Astronomical Society of the Pacific), 215–219.Google Scholar
Vermeulen, R.C., Readhead, A.C.S., & Backer, D.C. 1994. ApJ, 430, L41–44.Google Scholar
Walker, R.C., Romney, J.D., & Benson, J.M. 1994. ApJ, 430, L45–48.CrossRefGoogle Scholar