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Astron. Astrophys. 325, 479-483 (1997)

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VLBA polarimetric observations of 3C 286 at 5 GHz

W.D. Cotton 1, C. Fanti;3 2, R. Fanti;3 2, D. Dallacasa 2, A.R. Foley 4, R.T. Schilizzi;6 5 and R.E. Spencer 7

1 National Radio Astronomy Observatory*, 520 Edgemont Road, Charlottesville, VA 22903-2475, USA
2 Istituto di Radioastronomia del CNR, Via P. Gobetti 101, I-40129 Bologna, Italy
3 Dipartimento di Fisica, Universitá di Bologna, via Irnerio 46, I-40100 Bologna, Italy.
4 Netherlands Foundation for Research in Astronomy, Postbus 2, 7990 AA Dwingeloo, The Netherlands
5 Joint Institute for VLBI in Europe, Postbus 2, 7990 AA Dwingeloo, The Netherlands
6 Sterrenwacht Leiden, Postbus 9513, 2300 RA Leiden, The Netherlands
7 NRAL-Jodrell Bank, University of Manchester, Macclesfield Cheshire, SK11 9DL, UK

Received 8 November 1996 / Accepted 26 March 1997

Abstract

Polarimetric observations at 5 GHz using the VLBA are reported of the compact steep spectrum source 3C 286. There are two flat spectrum knots but both are too highly polarized to be a typical core component and both appear to be resolved in VLBA measurements. The morphology and polarization structure of this source is also quite distinct from typical core-jet sources. It is suggested that the core in this source is beamed away from us by relativistic effects and we see the portion of the jet that is beamed in our direction.

Key words: polarization – quasars: individual: 3C 286 – galaxies: jets – galaxies: nuclei – radio continuum: galaxies

Send offprint requests to: W.D. Cotton
*The National Radio Astronomy Observatory (NRAO) is operated by Associated Universities Inc., under cooperative agreement with the National Science Foundation.

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© European Southern Observatory (ESO) 1997

Online publication: April 28, 1998

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