Astronomy and Astrophysics – Astronomy
Scientific paper
May 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aj....105.1658s&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 105, no. 5, p. 1658-1665.
Astronomy and Astrophysics
Astronomy
5
Quasars, Radio Emission, Radio Sources (Astronomy), Red Shift, Space Plasmas, Very Large Array (Vla), Galactic Clusters, Radio Astronomy, Synchrotron Radiation
Scientific paper
We present Very Large Array and MERLIN images of the quasar 1222+216, whose radio structure is reminiscent of a wide-angle-tailed source. While such radio structures are common among radio galaxies of moderate power, they are rare among the luminous quasars. This quasar, with a redshift of 0.435 and a largest angular size of 19.6 arcsec, which corresponds to a linear size of about 131 kpc, occurs in a region of high galaxy density. This suggests that its structure could well be due to interaction of the radio emitting plasma with the external cluster environment. We examine the possibility that a rather abrupt bend is probably due to interaction of the jet with an external galaxy or cloud while larger scale features can be explained by the relative motion of the parent galaxy through the intracluster medium. We also discuss other possible scenarios and attempt to determine whether cluster membership or projection effects is the dominant factor responsible for the observed distortion of quasars.
Muxlow Thomas W. B.
Saikia D. J.
Wiita Paul J.
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