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Astron. Astrophys. 335, 145-151 (1998)

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Possible superluminal motion between two stationary components in the high-redshift quasar 1338+381

F. Bouchy 1, J.-F. Lestrade 1, R.R. Ransom 2, N. Bartel 2, M.I. Ratner 3 and I.I. Shapiro 3

1 Observatoire de Meudon, Principal Cedex, F-92195 Meudon, France
2 Department of Physics and Astronomy, York University, North York, ON M3J IP3, Canada
3 Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA

Received 31 July 1997 / Accepted 31 March 1998


VLBI maps of the high-redshift quasar 1338+381 (z=3.1) have been made at five epochs between September 1992 and May 1994. They reveal structure with two well defined components separated by 3.6 milliarcseconds and suggest at one epoch a third weaker component in between. We have significant evidence that the two main components are stationary over the 1.7 year period of observations and might result from a bent jet structure, as in 4C 39.25. We propose a scenario in which the weaker third component moves between the two stationnary components at the high apparent velocity of 27 [FORMULA] 17 h-1 c. We discuss briefly the location of this new compact F double sou rce in the [FORMULA] diagram.

Key words: galaxies: jets – cosmology: observations – galaxies: distances and redshifts – quasars: individual: 1338+381

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© European Southern Observatory (ESO) 1998

Online publication: June 12, 1998