Is the VLBI core of 3C345 moving?

Astronomy and Astrophysics – Astronomy

Scientific paper

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Black Holes (Astronomy), Extragalactic Radio Sources, Luminosity, Quasars, Very Long Base Interferometry, Accretion Disks, Astronomical Models, Orbital Elements

Scientific paper

In the superluminal source quasar 3C345, five VLBI knots have been observed to have superluminal motion and, in particular, the two knots C4 and C5 move along different curved orbits. This paper examines the possibility that this pair of orbits are due to the motion of the radio core. Using the available data, the motions of C4 and C5 are resolved as a superposition of a motion of the core and a motion along a common orbit. The results show that such a resolution can fit well the observations.

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