The sub-arcsecond structure of 4C39.25

Details The sub-arcsecond structure of 4C39.25 The sub-arcsecond structure of 4C39.25

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...280..128j&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 280, no. 1, p. 128-130

Astronomy and Astrophysics

Astronomy

1

Active Galaxies, Quasars, Radio Astronomy, Radio Jets (Astronomy), Angular Resolution, Astronomical Interferometry, Centimeter Waves, Image Resolution, Superhigh Frequencies

Scientific paper

We present a new 5 GHz Multi-Element Radio Link Interferometer Network (MERLIN) image of the superluminal quasar 4C39.25 at a resolution of 70 milliarcsec. The major contribution of this new image is that structures within the previously unresolved jet are exposed to view. The presence of a straight-line jet is now more obvious, and the structure of the source, particularly in the region where the jet enters the terminal hotspot, is very similar to that of larger sources. This provides further evidence for basic similarity between sources such as 4C39.25 and larger sources. However, the flux in the jet is not as strong as expected from simple versions of relativistic beaming/orientation unified models, and jet deceleration or bending may have to be invoked to explain the observations.

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