Relativistic Jet Kinematics of the GPS Source PKS 1345+125

Details Relativistic Jet Kinematics of the GPS Source PKS 1345+125 Relativistic Jet Kinematics of the GPS Source PKS 1345+125

May 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aas...200.4506l&link_type=abstract

American Astronomical Society, 200th AAS Meeting, #45.06; Bulletin of the American Astronomical Society, Vol. 34, p.715

Astronomy and Astrophysics

Astronomy

Scientific paper

We present 15 GHz multi-epoch VLBA observations of the gigahertz-peaked spectrum (GPS) source PKS 1345+125. The radio structure of this nearby AGN consists of a bent jet and counter-jet with an overall length of 250 pc. We report the detection of superluminal motion near the base of the approaching jet, which is highly unusual for a GPS source. The source resides in a ultraluminous infrared galaxy which has been detected in both CO (1-0) and X-rays. The host galaxy contains two optical nuclei separated by 4 kpc, the westernmost of which is thought to harbor the radio jets. We discuss the possibility that a recent merger may have triggered a precession in the jet axis of PKS 1345+125, resulting in its apparently bent morphology. Using a simple ballistic model, we discuss how light-travel time effects may account for the observed asymmetry and brightness distribution in the jet and counter-jet.

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